87 Spree will not rev up or cuts out
Posted: Thu Sep 25, 2014 12:16 pm
Hey all, Have not posted in some time but have been lurking for awhile. Just picked up this 87 Spree this summer. Not running of corse. Sitting for years. All my stuff is old and broke. History,, 3000 miles No crank. Found the ignition switch bad replace with new one and it cranks good. Cleaned the tank and carb. Bystarter missing the needel. Replaced with new, works good. Now the spree will start and idle good!!. What it is doing is when you full throttle it revs up and goes about 50 feet. 10 to 15 mph and it fall on its face. I let off and it idles good. I hit the throttle again and it revs alittle and fall down again. Now if I nurse the throttle I can get it to run OK between 10 and 15 mph, any faster it bogs out. On the stand I can get it to rev up some times?? I have rulled out fuel. Delivery is good. I pulled the hose off and used a mityvac and the hose flows great to the carb. I have rode it also with the mityvac connected and no difference. I have had the carb off a few times all clean and passages open. Took the exhaust off and made sure the port is clean. The manual says check timming and I did, the F mark is lined up with the pointer off idle. OK. I pulled the connections off at the Ignition coil, CDI and regulator. All look good. Compression is at 105 psi. I noticed in the FAQ ignition coil suspect. I might have another one. I will try that. I think the CDI is different 84-85, and 86-87? Correct?? and I do not think I have one. Ridding it some times I think it has a slight miss?? If I let off the throttle it runs OK. ANY suggestions?? My next thought is to try a different coil maybe check the reed?? Brian in MI.. 