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TT500 Head pipe & Carb

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Looking for a new head pipe to get some more out of the 540 kit. Who knows of some good places to pick one up? Also looking to try and find a bigger carb. Still running the 28mm stocker. Thanks for the help.

**Edit**

Why stop there? :) Anyone got any suspension links as well?

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Definetly get a 36mm or 38mm carb, Mikuni's work well. :) I have a 36mm on mine stick motor TT500 and had a White Bros overized exhaust but ran the stock header last year. :D I may sell the oversized soon. :) MD

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You can get a 36mm or 38mm Mikuni VM Round slide carb that comes as a White Brothers kit from Mark at www.thumperstuff.com for about US$ 250-it comes jetted almost right with the extra jets needed to jet it correctly.You also get a K+ N airfilter and the throttle and cable.I put this setup on my XT and have been totally happy with it's performance,it suited the 90mm Wiseco,porting and cam perfectly.

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Sudco offers a pre-jetted carb. I like the Sudco jetting as it seems to be the cleanest running right out of the box. For a stock engine a 36mm Mikuni roundslide is a good carb. For a modified engine you'll need a 38mm. For a fully modified engine a 40 mm might be required to extract the maximum power available but it is usually at the price of loosing some bottom end power.

As for the pipe if you need an up-pipe I'm not sure where to get them anymore but if you're not going to offroad much and can run a down-pipe you cannot beat the power output of a Jemco. They are made for flattrack so they are under the bike and very vulnerable to rock hits or smashing on jump landings.

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My favorite place to ride is flat tracking on the curvy roads up north(also legal with an orv), but the majority of the riding i do is trail riding, cornfields, woods, ect. She rarely gets jumped because we all know how graceful these are on the landings. Due to these conditions and the fact i still have the skid plate on makes me think its a good idea to avoid the down pipe.

Thanks for the tips guys :)

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25+ years ago, I roadraced an SR500 and then a more radical XT500. At least at that time, the 38 Mikuni roundslide was the hot setup. I tried a 40mm Mikuni but with stock displacement, it was virtually unridable except at full throttle and near peak rpm.

I am planning on recycling that 38 Mikuni on the SR500 (with 540 Wiseco kit etc) that I recently acquired. The carb was dialed in perfectly for a modified 500 with velocity stack and open megaphone exhaust. Any suggestions on what I want to try to change first to run with a similarly modified 540, but with K&N filter and Supertrap? Elevation is about the same in both cases (6,000 to 7,000 foot elevation).

Am I correct in assuming I might want to start by going one or two sizes more lean with the filter and muffler? It has been nearly 25 years since I tuned a round slide Mikuni and my skills are somewhat rusty!

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I'm running the open down pipe on my. Awesome. Stock carb with no air box and clamp on UNI filter.

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But that one is for a 550 not a 500.

Does seem pricey. Could probably have one fabricated for less.

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