atc 250f?

[buzzy613]

would i beable to bolt up a crf 250r in to an 85 to 85 atc frame? i think that would be a fun build buthow hard would it really be to do a full heart trasnplant

[audioworks04]

No, it is far from a bolt in. This has been done a few times, if you look through some older builds you will see the issues others have had.

[buzzy613]

alright thanks

[buzzy613]

ok i thought it over and ill keep the two stroke but insted of the honda 250r, i was thinking the powervalve motor from a 88-91 lt250r motor. any body dissagree?

[three_wheelin45]

.... why not put a newer cr250r power valve head on it??

[buzzy613]

the cr250r has a power valve? well ill just keep the motor and do that. i know a guy that has 6 atc 250r all parted out now i just go to save up my moneys thanx a bunch guys

[audioworks04]

I have no idea why you would want to use an lt motor, and you would need alot more than just a head from a pv cr motor. You would need the full cylinder and alot of mods to your cases just to run a pv top end on stock atc cases. Not trying to be a dream killer, just realistic. I would say do some research and find out what you want. You can do alot with a stock cylinder and the right port work.

[buzzy613]

alright cool i"ll think over it a little till i get the money saved up

[torker]

The power of the newer 250f's will amaze you.

TORKER.

[Dirtcrasher]

^ As well as how often the 250F needs motor work.

[HuffieVA]

If you have a blank check, go ahead and put a modern four stroke in it, after all if you run them like you designed they only cost you around $100 an hour to keep them in top running condition... Overall dirt bike sales are down nearly 60% over the past few years and the only ones selling more bikes than they can make/import are the companies still producing two strokes (Husqvarna, KTM, GasGas etc) the tide is slowly changing once again, the only thing holding back a major two stroke resurgence is the unfair advantage the thumpers are given at the pro level. I have nothing against four strokes in general but they are not (in small displacement) a natural born race motor, and in order to make them fast they greatly sacrifice reliability. If you simply want to trail ride I don't see a problem with them but if you want to be competitive in a race environment either open your wallet or but a two stroke because cc per cc even a 20 year old smoker with a good rider can smoke a thumper (at a tenth the operating cost)

[250rRoostmaster]

Very true Huff!!!

[three_wheelin45]

I agree with huffy 2smokers are more race material then a 4poke imo... I dont really like 2 strokes, But i will admit there fun as hell to ride!! I love riding my friends 250r and just roostin it... whew!!! and when you get off that sum beach your eyes are watering its just like

[audioworks04]

A new 450 is alot like a two stroke, in that it revs to the moon, but it has power everywhere. They really are not that much of a money pit aslong as you take care of it. Jet it right one and change the oil every 2.5 hours of ride time, I run rotella T 15w-40 and a stainless steel oil filter. I do valve checks every 10hrs of ride time and adjust as needed. I have over 50hrs on my 450 and have not done more than valve adjustments to it. In my book thats pretty good. Dont get me wrong I wouldnt get ride of my smoker, I love it equally as much and still have a blast on it.

[Dirtcrasher]

Nothing so bad about the 450, but the Honda 250 is a maintenance nightmare..... I wish the guys like NINJA who service them could explain to (edit -this thread) as well as he did to me......

I've said it before, when and if I build a 250F, it will be a Yamaha engine in an 86 200X or 250R chassis. I have all the 86 200X parts to make a roller, so that would be easiest..............