I am trying to determine what length A-arms and swingarm to get for the 250r I am building. I am probably going to get 4+1 offset rims on the front so I can get 1" longer A-arms with out adding more width. I will eventually be getting a 330 - 350 Powervalve top end, and wondered if the '88 STD length swingarm would be long enough. So I guess my questions are:

Is an '88 length swingarm long enough for a 330-350 PV?
How wide would the 250r be with +1" A-arms w/ 4+1 offset rims?
How wide would the 250r be with +2" A-arms w/ 4+1 offset rims?
How wide would the 250r be with +3" A-arms w/ 4+1 offset rims?
Which of these a-arm lengths would you recommend all around use?

Thanks
Chris

 

By +4"/+1" you mean like stock offset? I would get +3" wide +1" forward A-arms with stock type rims. Of course you'll have to get shocks to match.
ERIC

 

4" of rim on the A-arm side and 1" on the outside:


|..................................|
|..................................|
\-----------------------\/---------/

<------- 4" ---------> <- 1" ->

<-- A-arm side

Hope that looks right!
Well I did my best.

 

Did everyone get discouraged from replying because of my sh|tty illustration, maybe I should remove it? [img]i/expressions/face-icon-small-confused.gif[/img]

 

What are you planning to do with it? I run +2+1 front a arms with a 1 incch more offset on my rims to give me the plus 3. IF i had it to do over i would buy the +3 a arms for mx.

 

It will be used for wider trails, but I would like it to perform well in most conditions and terrains.

 

i do 90% duning and i run a timmyboy 2+1 aarm and stock 86 no link swing arm with tcs shocks... 86 is 2 inches longer than 88. if your doing trails than stay with teh 88 length as you will still be able to maintain great manueverability. the cool thing about the PV motor is you dont get much of a hit keeping the front end down shouldnt be too hard one thing to keep in mind is not to sacrifice optimal handlng just to compensate for a more epowerful motor. let your riding skills take care of that

 

For wider trails and such i would stick with the +2+1 front end and a +2 axle with the 88-89 length swing arm.