Quantcast
Jump to content

  • Join Today, It's Simple and FREE!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

Recommended Posts

i have a bare frame from a 300ex i picked up and a cr 500 my plans are to make a honda quadzilla and i was wondering if anyone knows the size differance in 250r and 300ex swingarm and a-arm mounts. so if you have a 250r i was wondering if some one could tell me the distance between inner and outer edges of the mounts on the upper and lower arms. i have a 250r 3 wheeler and believe the swingarm to be the same so i can referance off that for the rear any help would be appreciated thanks

Share this post


Link to post
Share on other sites


I have a CR500 powered TRX 250R. The ATC swingarm is the same as the 86-87 250R's. I will measure the a-arms on mine and let you know. What year is the motor you have?

quad009.jpg

Share this post


Link to post
Share on other sites

i have a 1992 cr500 that im gonna pull the motor out of. how did the 500 fit in the 250 r frame that looks mean. i was gonna go with a 250 r frame and may still if i cant do the things i want with the 300ex. how did the pipe workout is that the 500 pipe or 250 i was worried about needing to make one.

Share this post


Link to post
Share on other sites

It is the CR500 pipe, I cut it and twisted it to fit in the frame, it seems to work ok. The motor fit pretty easy, I have an '86 motor so it has a 15mm hole in the rear of the case, so it fits on the swingarm bolt. The newer motors have a 17mm hole and would have the hole reamed out enough to put in a 15mm i.d. bushing so that it can mount to the swingarm. Or you can make a bracket and not mount to the swingarm, but you have to keep the sprocket as close to the pivot as possible and keep it lined up with the lenght of the swingarm in order to keep from having chain problems. The 250R a-arms are mounted 25cm(about 9.75") from the inside edge of the rear side of the rear bracket to the inside edge of the front side of the front bracket. The brackets are 5cm(about 2") wide on inside edge to inside edge. You might want to check out this thread cr500 in a 250r frame - E2S There some good pics and info that you may find helpful.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


×