a quad upgrade, tire question

[juanki]

i recently sent mi top to neil to do a bore and port job on it. the quad is now about 290. I will be useing it to mx track and desert type terrain race (long and straigth), and like fast trails in a desert terrain.

so for mx i have 18 inch tires, and i think its ok. But for the desert trails, i got kenda knarly in 22 inches.

my mechanic tells me that it will give my quad too much stress for beign big and heavy tires.

i know that it sound logical, but really is that much stress on the engine? any experience/advice on this dilema from any of you, please.

[deathman53]

290???, you must have a 72mm sleave installed in the clyinder. stock is 246, 80 over is 263, 120-140 over is 270. 72mm is 293. I wouldn't listen too much to his advise about 22" tires. Yes, mx: 18" tires on 8" rims and woods: 20" or 22" rims on 8" or 9" rims. You gearing has a big part of that too. What is yours at??

[juanki]

i have stock gearing, and stock sprockets, well the sprockets are not stock but in stock size.

[kiesta00]

22" tires aren't too much "stress" you just have to gear it right

we run 22" 4-snows all the time and have no problems with high speed runs.

[86 Quad R]

there is a tremendous difference between 4-snow and kenda knarly 22 inches tires. :blah:

[Scott-300ex]

Just learn how to work the clutch, hell, most 4 jokes these days and trikes used to come with 22 inchers.

You'll be fine, especially with that motor upgrade and you'll gain top end.

[MossboysRacing]

I race Harescrambles on my R and its still a 250. I ran 22 inch Holeshot XCT for a long time with no problem, i just droped the front sproket down to a 12. I run 20's now with stock gearing and its great. I still keep the 22's around for the real muddy (deep Rutted) races that we tend to have here Missouri

[Scott-300ex]

MossboysRacing, I live pretty close to you, in Waterloo IL, we should go ride together sometime, bring the 250r's back!