HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
almostinvincible119

03 450 forks/clutch springs

8 posts in this topic

i have 2 questions concerning my 03 yz450f. it seems as if the compression adjuster is on the bottom of the fork under the rubber protector cover? am i correct and if so, turning clockwise from under the bike would soften the suspension, correct? also, is it possible to put 250f/yz250 clutch springs in my 450? it seems abnormally hard to pull the clutch in through the corners and most other 450s i have ridden do not the kind of tension on the clutch. Thanks everyone

Share this post


Link to post
Share on other sites

Clockwise on the clickers stiffens the damping; counterclockwise softens it. Be aware that the '03 fork is SENSITIVE to oil level changes, and they get pretty harsh near the high end of the recommended range. Consider checking the level, and run it as low as you can get away with without bottoming all the time, down to the 130mm limit. I used 110mm on mine while I had them. Sub tanks also help a lot.

On the clutch, the best solution, other than a complete Hinson, is to get this kit from Yamaha. Lighter pull, much smoother, freer operation. You can also lengthen the actuator arm to match the one in the kit, but the original '03 plate set will likely drag excessively if you do just that. Don't try lighter springs from a smaller bike.

Share this post


Link to post
Share on other sites

thanks grayracer, i noticed that the plates are made for a 2005...they wouldnt work would they? or do i need to go to my yamaha dealer to get the 03 kit. also, with the subtanks, does it help on big hits or small choppy bumps. (what kind of tanks would you recomend) im having harsh landings on big jumps, and it feels like my front end is running over the grand canyon when i hit small bumps.

Share this post


Link to post
Share on other sites

Dont spend the money on subtanks yet. Spend the money on a revalve for the forks and shock first. It makes a huge difference. I eventually swapped the 05 TC forks on my 03 450, even better yet.

For the clutch, go buy a new cable, lube it. Then buy a ASV lever and perch (or something that uses the Honda CR pull ratio). To make takeoff smoother, you need the 02 clutch parts - the inner most friction plate, the spring washer and washer. Install those removing the first plate from the stock clutch and it will make things smoother. ALso if you just purchase the GYTR clutch kit it comes with all those parts plus a new acuator arm. Best deal for like $90 retail.

Share this post


Link to post
Share on other sites

TC Forks? also, my cable is brand new, i bought the bike BRAND new in the summer of 05 but it was in a climate controlled warehouse and i lube the cable frequently...(it might not hurt to replace it, seeing it might have a little rust on the cable) also with the honda pull ratio? buy a honda lever? most clutch levers fit every bike...right? who do you recomend for the revalve, pro circuit , MB1, proaction.....?

Share this post


Link to post
Share on other sites

rookie.

TC = twin chamber. The 05+ stuff on the YZs.

Revalve, I would suggest to go to your local MX track. Talk to those that are riding. Find out who is liked and not so liked. Then talk to the person or shop. Try to support those that support the local riders.

Clutch parts, yes you can add some parts from the 426 to smooth out the takeoff. I would just suggest to purchase the GYTR clutch kit. Comes will all that in there.

No levers only fit certain perches. Easiest way is to purchase a ASV clutch perch and lever set. You can also purchase cheap CR lever/perch sets, but the ASV type of levers just dont break.

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
Sign in to follow this  
Followers 0