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
jobstress

What should I do?

6 posts in this topic

My WR 400 is going into its sixith season. What maintenance should I do besides the obvious oil and filter. Cables? Valves? Suspension? Bearings? Nothing is leaking bike runs and rides great I just want to prevent problems as things maybe wearing out.

Thanks Jobstress

Share this post


Link to post
Share on other sites
My WR 400 is going into its sixith season. What maintenance should I do besides the obvious oil and filter. Cables? Valves? Suspension? Bearings? Nothing is leaking bike runs and rides great I just want to prevent problems as things maybe wearing out.

More important than its age is the number of hours on it and how it's been ridden. Assuming it has an average number of hours on it I would at least be looking at a freshening of the top end including head reconditioning and cam chain, new wheel bearings, new swingarm pivot and linkage bearings, all new cables, and new stearing stem bearings. While the engine is apart you should have the crank and rod checked. Other things to check are clutch condition including the basket, airbox boot and carb intake seals (rubber can get hard and brittle with age), replace fork oil, have the rear shock serviced, and generally check over the bike for any signs of wear or fatigue.

While the bike may be running fine right now, and the Yamaha 's reliability make it seem bulletproof, there are service limits to some parts that should not be ignored. The biggest problem with many four stroke parts is that there are only two states of condition: working and broken. There's often no in between to warn you of an impending failure. Waiting until something breaks will likely cost well more than an overhaul done in a timely fashion. On a bike that is already 7 years old, I wouldn't take any chances.

Share this post


Link to post
Share on other sites

Does anyone else have suggestions. How much am I looking at? I am not super knowledgeable and will most likely have a shop do the work.

Share this post


Link to post
Share on other sites

I'm not sure I would go to the extent that rick suggests unless you're competitive with it. I would check the valves, grease all your bearings and linkages, and do all the other inspections he recommends, but a complete tear down of the engine and a new top end would be pretty expensive, especially if you're having someone else do it.

On a bike that is already 7 years old, I wouldn't put too much money into it.

Share this post


Link to post
Share on other sites
I'm not sure I would go to the extent that rick suggests unless you're competitive with it. I would check the valves, grease all your bearings and linkages, and do all the other inspections he recommends, but a complete tear down of the engine and a new top end would be pretty expensive, especially if you're having someone else do it.

On a bike that is already 7 years old, I wouldn't put too much money into it.

I agree......... my 99' has been very well maintained over the years, I have no blow by, the oil and filter look clean every time. I have gone through and replaced or lubed each and every bearing atleast twice now. I would not hesitate to take it out tomorrow on a 100 mile loop in the moutains :applause:

I think tearing down the engine is a little extreme unless you plan on depending on it for competition :bonk:

Just my 2 cents

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