Ok so I just got this 1988 CR250R. I ran a half tank through it before it was obvious it needed work. It has been running really rich. Right now I can't get it to start, I pulled the plug and it's wet with fuel. I replace it with another new plug and it still wont start, wet with fuel again.
When I got the bike, I noticed it had a small fuel tank leak so I replaced the stock tank with a used Clarke. I cleaned it out really good, as well as the petcock and screen. I also drained and filled radiator with engine ice, changed engine oil (which looked like it had some gas in it), and put in new air filter (uni). I also rebuilt the carb with all new gaskets, vent and gas lines, new stock 185 main, and new stock slow jet. Needle is stock 1367 with clip in fourth position per manual. I set float to 16mm, air screw two turns out per manual. Carb is ultra clean. I have been running Sunoco 90 octane non-ethanol in a 32:1 mixture. I also repacked the muffler.
Bike just will not start. I put in a brand new denso (correct per manual), and it is just soaked with fuel after many kicks and not starting. I remove denso and replace with brand new ngk .... same thing. Will not start and covered in fuel.
I strongly believe whoever had this bike before me tried real hard to cure the rich running issue but ultimately could not. I found the carb to have a leaner main 175, and clip raised two positions over manual recommendation. When bike did run it spit black oil out of the pipe, hard to start, and only really ran ok wide open. The engine has all new gaskets and seems to have good compression.
Anyone know what I should do here?
Thanks!
I also need to rebuild the calipers, install new bearings, seals, etc (it doesn't end!)
When I got the bike, I noticed it had a small fuel tank leak so I replaced the stock tank with a used Clarke. I cleaned it out really good, as well as the petcock and screen. I also drained and filled radiator with engine ice, changed engine oil (which looked like it had some gas in it), and put in new air filter (uni). I also rebuilt the carb with all new gaskets, vent and gas lines, new stock 185 main, and new stock slow jet. Needle is stock 1367 with clip in fourth position per manual. I set float to 16mm, air screw two turns out per manual. Carb is ultra clean. I have been running Sunoco 90 octane non-ethanol in a 32:1 mixture. I also repacked the muffler.
Bike just will not start. I put in a brand new denso (correct per manual), and it is just soaked with fuel after many kicks and not starting. I remove denso and replace with brand new ngk .... same thing. Will not start and covered in fuel.
I strongly believe whoever had this bike before me tried real hard to cure the rich running issue but ultimately could not. I found the carb to have a leaner main 175, and clip raised two positions over manual recommendation. When bike did run it spit black oil out of the pipe, hard to start, and only really ran ok wide open. The engine has all new gaskets and seems to have good compression.
Anyone know what I should do here?
Thanks!
I also need to rebuild the calipers, install new bearings, seals, etc (it doesn't end!)