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
ben

irractic running just above idle ???

2 posts in this topic

Proud owner of a Standard 2001 WR400. The bike was raced in the French ISDE and has only done 6 days work!

I now own the bike and there are two little problems. As the bike comes of the idle, it is hesitant and surges. On full throittle it flys! On the over run as you approach a road junction there is an occasional massive bang and a flame out the back according to my mate who was following me the other day. The plug indicates the bike is running very rich. There are no leaks around the exhaust that could cause the bang (back fire). It was suggested that i should check the diaphrams in the carb for any dust / muck or water. Yes, there was a tiny amount that made not difference to the symptoms after I put the bike back together.

I think the problem is occuring as the bike comes off the idle jet and onto the main jet, but I don't know which thing to check next. I think it would be worth while to have the carb off and blown through by an airline, but I am not convinced that this will affect the running. I think it is the set up of the carb. Has anyone had similar problems or can anyone offer any advise on what to check / adjust? Any help would be much appreciated.

Cheers

Ben.

Share this post


Link to post
Share on other sites

it's the old story! how far do you want to go?!?!

the best thing to do is make a little screw driver and go out with the bike practicing lillte snap wheelies and adjusting the pilot screw a half turn at a time. i think you'll need to screw it in.

all you do is warm it up and go around blipping it at low revs.

i made a screwdriver using a small electricians screwdriver, cut the "rod"off and flattened a face on the bench grinder. then i stuck it in a block connector. hit the spot :)

try it. otherwise just go to allens and get yourself all the jets in my signiture and get on with it.

if you're intent on staying with WR timing get a OCDRM needle from yamaha or a DMM needle from allens.

good luck

Taffy

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