this person has been parting out an 87 on e-bay. may try to contact and see if he has a carb. cmt_technologies

klinc wrote on 12/31/69 at 16:00:07:


Flames shooting out the exhaust sounds more like a timing issue than a fuel issue.  

Well I got a hold of the carburetor from the same person that I bought the motor from. I took it apart and cleaned really well. It was gunked up very bad.

This is the carb that was in the motor when he had it and the jets were way way off from what I was running in my carb for my motor (eg. 155 main jet in mine and 140 in the carb that I got from him). So, yeah it was dumping alot more fuel in it then it was used to taking.

Of course while I had the carb I got today apart I just ahd to use my needle setup in it (It looked to have original spacer in it) and the main jet was missing the metal washer underneath it, so I put mine in there underneath. Yeah, I know I should have left it at what is was first.

It starts now again but with a little more then 1/4 throttle was popping and shooting out white flame now ( this was at night this time). It doesn't start popping until I give a little more throttle than before. Will put the spacer back to the way it was tomorrow and see what happens.

Thanks all for your input.

Edit: Almost forgot.... There is no fuel leaking through the vacuum line from the petcock.

Two different motors and two different carbs and no change?  It almost has to be ignition like a bad coil or plug wire perhaps.  You need to focus on the constants, or what *wasn't* changed.

enophile wrote on 12/31/69 at 16:00:07:


First motor ran ok. I just took it out because of oil leaks in the middle of the crankcase and I was not comfortable with taking an entire motor apart.

My motor had 23,000 miles and I found a motor off a 1998 with 3,800 miles for only 350 dollars. The guy said the motor ran fine, but his girlfriend freaked out and hit curb and stopsign and bent the rims and front forks all up so he was parting the bike out.

Yeah, I am done with the carb for now. It has to be with something in the motor.

Is there an easy way to check the timing. I see on here how to check/adjust the valves and along with that putting the piston/valves at a certain point.

If the timing was off I would never be able to get the two to that point right? So, would that work to check timing or is there something else I have to do?

Sorry if I seem to be asking stupid questions. Learning as I go, but I will never forget this stuff this way.

klinc wrote on 12/31/69 at 16:00:07:


OK, I got confused.  In that case, I go back to my original idea of being a timing issue.  I'm assuming you have your original electronics for ignition so there would be no change there, so it would probably be valve timing.

Remember having seen this problem on the German forum.
Your frame and the CDI are from '87 and the engine is from '98 ; they don't match

Now you can do 2 things:

1) Remove the rotor from the 87 engine and install on the 98 engine - or

2) Get the CDI from the guy who sold you the 98 engine and install on yours.

Problem solved.

Greetz
Kropatchek 8)