Speedway Karting / BNSS F200 / Yamaha YF200R1 F200

New YF200 Lite Con Rod

BNSS-ADMIN — Thu, 06 Mar 2008 18:42:05 GMT

Click on the link below for details on our new "Lite" rod for the Yamaha YF200.

http://test.burrisracing.com/support/forum/Forum6-1.aspx

YF200 Gen lll Valve Kit Now Available

BNSS-ADMIN — Mon, 24 Dec 2007 13:01:01 GMT

Click on the link below for information on our just released Gen lll Stainless Valve kit for the YF200. http://test.burrisracing.com/support/forum/Forum6-1.aspx

YF200 Stainless Exhaust System

mikeburris — Thu, 01 Mar 2007 17:09:43 GMT

Below are photos of the all new stainless exhaust system by RLV we have been testing for the last few months. All componets (except the blue muffler/tail pipe clamp and cradle mount) are polished stainless steel and typical RLV high quality. This complete system is an industry 1st and should really catch on with those quality conscious karters who want nothing but the best for their Yamaha's! So far testing has shown the new system to be very trouble free (no rust or corrosion) and easy to maintain and keep looking like new.

Permanent tooling is being readied at this time and once we get pricing info we'll pass it on. (Expect pricing to be about double what the mild steel system is.)

YF200 Header Brace

mikeburris — Thu, 14 Jun 2007 13:00:38 GMT

Here is a photo of a header brace we made up for the Yamaha YF200 that some of you may be interested in. We have a sprint track here in CA called Moran's and they require this rather large (and heavy) silencer and after running there several times we experienced the front header stud wanting to pull out from the weight hanging on it. Anyway, we made a brace that goes from the fuel pump mount boss to the header which counters the loads in that direction and so far everything seems tight and staying in place.

YF200 racing temperature

twobits — Thu, 26 Jul 2007 23:09:20 GMT

What is the preferred engine temperature for the YF200 (SR Champ)? I was told by another racer that he runs at 375 for max curve and because anything above 400 could damage the bigger valve seats. He told me that the company that did his head work said that temperatures over 400 could possibly loosen the valve seats and they might actually fall out! Could this be true? I've been running my motor around 435 on asphalt but am I overheating it and loosening power?

Thanks..

Parts Wanted

minidragbike — Mon, 25 Jun 2007 21:05:55 GMT

I'm a open Yamaha racer that needs a little help to get back going. If anyone can help PM me, or email me at mr.outerlimits@yahoo.com

I had a stroke of bad luck this last Saturday. I was racing my little alky Yamaha and the cam gear broke from the cam shaft. It cause the welded on crank gear to get a little damaged in the process. So I'm looking for another stock #51 cam (which is what I was running) and a crank and crank gear.

The only good news is that I beat a stroker briggs WF engine. I was headed out for the rematch when it broke.

Prop's to "JIM" of Faster Motors. The chain gaurd plus save me this time.

CNC ported head

Tim Harp — Wed, 19 Jul 2006 10:29:13 GMT

A new development for the Yamaha head. See www.BelmitDevelopment.com Anyone know if there is a big enough difference to say it is worth it. I know the power is in the head, so maybe it would be worth it! What do yall think....?

Tim

Fuel Pump?

twobits — Sun, 20 May 2007 20:45:58 GMT

What is the difference between the Mikuni and the Walbro fuel pump and which one and why is preferred for the YF200?

Preferred motor mount?

twobits — Wed, 25 Apr 2007 10:19:34 GMT

Which is the better mount for the YF200 on a champ 5* or 15*? If the 5* is better and will fit on a champ, how much oil should be run?

Thanks..

Nick

Great deal on a block, a piston, and two engine kits

Tom — Wed, 18 Apr 2007 07:23:12 GMT

Just doing a little spring cleaning.

I have a block and a piston that was used as a "mock up" to check some measurements that I will sell for a deal. Neither has ever been run.

The piston is standard size (202-00) with rings and wrist pin. The rings have been set and are installed on the piston for a standard bore. This piston will sell for half off price.

The block has been honed for clearance for the above piston. It has the head studs and hollow dowel pins installed with loctite, and it has the black sidecover studs installed with loctite. Bare blocks are regular $299, I will sell this one for $285.

I also have 2 engine kits with the header kits that I will sell for $950 each. These kits have the 6259 rod but do not have a billet flywheel. With a purchase of either of these kits, you can add one of our billet flywheels for an additional $150.

You will need to contact me directly here at ARC to get these prices on these items. 800-521-3560

ARC stocks all the parts for this engine, so if there are any other items you would like to add we can do it.

Tom Cole
ARC Racing

YF200 Side Cover Gasket

BNSS-ADMIN — Fri, 16 Jun 2006 00:21:17 GMT

There is a new side cover gasket available that should greatly reduce if not eliminate any stud breakage. Click here for details.

http://test.burrisracing.com/support/forum/shwmessage.aspx?ForumID=6&MessageID=25

YF200 Weight

twobits — Mon, 19 Mar 2007 09:34:14 GMT

How much does the Yf200 weigh without a mount and clutch?

Thanks..

Timing with your ARC flywheel

Domenick22 — Wed, 28 Feb 2007 19:40:00 GMT

I used the ARC flywheel last year after using the stock Iron unit for 2 years before.

I use the straight key and center the notches of the adjusters in the centered position.

I'm wondering what happens as I move forward and what happens as I move back, Timeing 101 please explain.

Thanks Rich D

15% off in-stock Yamaha Parts Sale at ARC

Tom — Mon, 19 Feb 2007 11:03:15 GMT

Just in time for rebuilds, we are putting all ARC's in-stock Yamaha YF OEM parts on sale at 15% off regular racer price. These are the parts that have the F21- prefix (OEM parts) at www.f200parts.com This sale will include ARC's billet flywheel and billet rods and bearings for the Yamaha. Sale ends 3/20/07

Special close-out sale items such as the metal sidecover gaskets, .036 and .040 head gaskets will be 50% off until they are gone. Check the Specials page for these deep discounted products as well as some other great specials.

I will get www.f200parts.com updated as soon as I can so you can order online, but you can call in your order too. It would be best to ask for me.

Tom 800-521-3560

Broken Rockers

T Hinton — Wed, 04 Oct 2006 11:40:07 GMT

Looks like there is a little commotion going over at "Briggs central" about Rocker arms... (OK, Yes, I look at the board occasionally but never post anymore) It seems as though someone with a Yamaha is having a little trouble with Rocker breakage? Of course this was after running the engine in 20+ races before it happened.. Has anyone else been having this problem??

Gen ll Valve Kits Now With The XR Springs!!!!

BNSS-ADMIN — Wed, 20 Sep 2006 19:28:08 GMT

The F21-415-10 Gen ll stainless valve kit now include the tried and proven XR valve springs! After purchasing the springs in larger quantity, (which resulted in a significant price reduction,) we decided to include them so all the necessary items needed to upgrade your Yamaha YF200 valve train would be in one handy package. Everything is there; valves, springs, retainers, split locks, wear caps, etc. Just re-size the guides and assemble!

Go to the Tech Shop for more details.

Yamaha Rod

little nastee F200 — Tue, 19 Sep 2006 08:49:52 GMT

We have raced our Yamaha built by Craig Covington of New Wave Karts here in Louisiana with the original kit rod for 2 1/2 seasons of HARD racing with no failures. We have kept the bearings changed after every season when we freshened it up. It wasn't slowing down then but we did it so we could see how they were holding up since not many people then were runing F200's then. Changed the oil after ever nite of runnning the thing thru the ringer and we have used the "Burris oil" only in our motor. Trying to use up what we have left.

We have have run this junior 2 any where from 7800 rpm's to 8600 rpm's which is where it loves to live. Pulls like a monster when we run 8600 with no signs of slowing down, we just set the gearing so it doesn't pull any higher. That's why we call it "little nastee".

Changing the rod so we can come to the asphalt race at Vincennes on Oct. 7th. We figure the rod earned a rest. Thanks to Yamaha and Burris for putting together a great package. My hats off to all the motors...we have seen just about all of them run and any given nite any one of them can win.

Motor mount ????

Kart11 — Tue, 12 Sep 2006 09:57:15 GMT

Just got an yf200 been running better but the motor blows a lot of oil out the breather. Its got 15* motor mount , stock valve cover , 16 oz oil . The $1000 question is could that be causing my problem ??? How much oil should I use with this angle on the motor. Off the throttle it smokes on the throttle it stops. witch leads me to believe that the oil is backing up in the valve cover and getting sucked past the valve guides when the throttle plate is closed causing a lot of vacume on that side of the plate. pulled the cover off lots of times and I dont see an obstruction in the oil gallery. It was just rerung and I know I didnt skrew up the rings, the motor runs strong ,the fastest thing at the track. Has anyone had a problem like this before???? Any help would be kool.

thanx

New Oversize Pistons For The YF200

BNSS-ADMIN — Fri, 08 Sep 2006 14:50:14 GMT

Go to the Tech Shop at Burris Racing for information on the new piston oversizes and other updates for the YF200.

Welding the crank

Domenick22 — Mon, 14 Aug 2006 21:52:37 GMT

Am I going to have any issues of welding the crank after I have raced it a few years, with oil effecting the weld?

Has anyone mig welded a crank or just tig?

Gen ll Stainless Valves and other Upgrades for the YF200

BNSS-ADMIN — Mon, 21 Aug 2006 17:17:08 GMT

Click here Tech Shop for details on the latest upgrades for the YF200 Yamaha.

These include our new and improved XR Gen ll stainless valve train kit along with the latest XR Super 8mm side cover studs and a mounting kit for the Mikuni DF44 fuel pump.

YF200 ARC Flywheel Puller

mikeburris — Fri, 14 Apr 2006 20:20:46 GMT

Here's a great product for those of you who have the ARC 6608 billet flywheel on your YF200 Yamaha. Justin Overfelt of Checkered Past Racing in Brownsburg, IN came up with a combo flywheel tightener and puller all in one. One person can easily tighten or remove the flywheel in less than a minute! The puller in the photo is a prototype so I don't have any details regarding price or availability but Justin can be reached at checkeredpast@sbcglobal.net if you are interested in one. (I believe they will work on other versions of the ARC flywheels with billet hubs but you'll have to check with them to be sure) Justin is also making some other tools to check valve seal from the combustion chamber side by vacuum for the YF. As soon as we get some photos we'll post them for you to check out.

Mike

Valve cover

Domenick22 — Tue, 18 Jul 2006 11:06:01 GMT

Are we allowed to weld 2 valve covers together, stacked ?

RLV Exhaust

Domenick22 — Thu, 13 Jul 2006 22:43:43 GMT

Has anyone added a longer tube to the mid section on a RLV exhaust system on there F200 Yamaha? What results would you get? I'm thinking 6" or so,

What oil now???

Rich Eisgruber — Mon, 01 May 2006 07:54:23 GMT

Talked with my engine builder and he said Burris Hi-rev is no longer being sold. I've been hearing a lot of guys are using Thor medium and heavy, some are even using a 50/50 mix, anyone having good luck with this oil?

EC-450 intake

newwavekarts — Tue, 14 Mar 2006 02:32:35 GMT

Is there anyone who has tried the EC-450 intake manifold? If so, what findings are you willing to share?

Breather or no Breather..................That is the question

Domenick22 — Thu, 09 Mar 2006 23:26:03 GMT

Well I am wondering weather to use the stock one in the valve cover, use an automotive one or dont use any at all?

That is the question.

Thanks

Cam Timing

Gateway — Thu, 09 Feb 2006 06:48:22 GMT

What is the best way to remove the crank gear and index it to advance & retard the cam. Tools used? heat? freezing?

I'm looking to advance the cam for better bottom end, I'll try 1/2 tooth or 1 tooth, looking at the crank gear on the crank which way will I move it to advance the cam? Clockwise or counter clockwise?

New Stainless Valves for the YF200 Coming Soon!

BNSS-ADMIN — Thu, 15 Dec 2005 20:04:19 GMT

Here is a new sneak preview of our new updated valves for the YF200 Yamaha. They are made from premium quality stainless steel forgings and have swirl polished heads and stems for improved flow. Other features include contemporary split keepers and light weight chrome moly retainers. These will be a direct bolt on replacement to the OEM valves and the only machining needed will be to ream and size the valve guide for proper stem clearance. These valves make a very reliable engine even more so, especially for those of you running the YF in sprint racing which requires rpm’s in excess of 8,000. The new valves will be available right after the Holiday’s. Stay tuned!

Timing

T Hinton — Fri, 27 Jan 2006 11:30:20 GMT

Just wanted to see what other guys are doing about setting engine timing.. Are you just doing it statically(engine stopped, from a measured/calculated point) and/or using a timing light.. What is the procedure for using a timing light on an industrial engine?

f200 oil rings

kart72 — Sat, 21 Jan 2006 19:40:21 GMT

Ok, I have been trying to get the oil rings in with the expander ring. I just cant get it. what is the secret to have all 3 fit in the groove properly?????? am i having a brain fart here????? i get the bottom oil ring in, then put the expander ring in, then try the top oil ring and it seems to tight. HELPPPPPPPPPPPPPPPPPPPPPP.

YF200 Connecting Rods Heads Up!

BNSS-ADMIN — Thu, 19 Jan 2006 13:45:44 GMT

Having heard of several more failures lately we’d like to remind those of you who are running a Yamaha YF200 that has an ARC #6260 connecting rod with the offset cap and forced oiling that they should be changed out for the newer #6259 rod ASAP! The problem is not widespread but it is a problem you do not want to have. If the rod does fail, it usually takes the block, crank and cam with it. Better to be safe than sorry.

http://test.burrisracing.com/support/forum/shwmessage.aspx?ForumID=6&MessageID=19

Installing an ARC#6608Y Flywheel

Tom — Wed, 11 May 2005 10:42:08 GMT

If you would like my help, please call me.
800-521-3560

Burris Tech Shop

BNSS-ADMIN — Fri, 01 Jul 2005 14:01:53 GMT

Burris Racing has set up the Tech Shop to keep its customers abreast of the latest updates and FAQ's for the Yamaha YF200 engine (and our other products as well). This can prove to be a valuable resource for future reference so pass the word around about the Tech Shop to your karting friends to bring them up to date. Since this is a work in progress check it out from time to time as we will be adding to it on a regular basis.

When to rebuild?

Rich Eisgruber — Mon, 05 Dec 2005 09:55:01 GMT

I've run about 16 races plus some practice days on my YF200, its still running strong but does anyone know how long you can run these before they need to be freshend up.
Just curious

Guides for the Yamaha

hensley1 — Mon, 14 Nov 2005 22:28:57 GMT

I am looking the a set of guides and carb kit..and a better style carb thottle arm

In Indiana around Terre Haute ,,,

Where is the name of the Guys in Crawfordsville or do i need to call Rix Rockets

exhaust temp?

Rich Eisgruber — Mon, 09 May 2005 07:55:59 GMT

anyone know where I should locate the exhaust probe on these motors, I'm running a my-cron.

Thanks

Rich

FYI: Exhaust Pipe Maintence

Domenick22 — Tue, 12 Jul 2005 21:39:38 GMT

FYI: I have been noticing carbon building up in the pipe now for about 2 seasons and I usually clean my pipes after every race, I use a speedo cable with 4 small pieces of Scotch Brite 1 3/8" square on it and pull it through the pipe 4-6 times with some engine degreaser sprayed in the pipe and on the pads, the pipe has a high luster to it when I'm finished.

Also with a mini grinder clean up the header flange area for a smooth transion from the head, I have eliminated the gasket and us straight high temp silicon and have had great sucess.

I can make the pipe cleaners if anyone is interested Ricxman22@aol.com

That little O ring.

Tom — Tue, 27 Sep 2005 11:06:47 GMT

Last week, all of a sudden we had several people order the little black O ring that goes on the black oil fill cap on the back of the engine. It got me to wondering so I went home to check on mine. Sure enough, it was gone. And I have no idea how long it has been missing.
This is one of those things like a clutch key, if you watch what you are doing, you probably won't ever need another one.
The O ring does not appear to be "mission critical," but I thought I might be able to helps some others keep from losing theirs.

Boring/Honing

T Hinton — Tue, 21 Jun 2005 15:21:31 GMT

Im gearing up my engine building tools and was wondering what different types/brands of Honing equipment is being used by the pros and home builders. I would like to get a portable unit that is stationary like this one.

But not sure if I want to spend the bucks...