HUGE backfire issue!

GoldenMotor.com
N

Nnn

Member
Mar 15, 2018
115
4
18
50
Venice Motor Bikes said:
Backfiring is almost always from either a carb issue or the timing being off.

Clean out the carb jet first; if that doesn't help?, then try a new CDI (black box).

Also, make sure your gas & oil is properly mixed!!! (too much oil might also cause this problem)
Click to expand...
Changed cdis still backfired. Carb is spotless and in terms of gas and oil all I do is fill up a water bottle then go 500 devided by 32 and i get 16ml of oil
 
Venice Motor Bikes

Venice Motor Bikes

Custom Builder / Dealer/Los Angeles
Mar 20, 2008
7,272
1,810
113
Los Angeles, CA.
Ok... Lets start at the beginning....

Was the engine ever running well?

Did you do ANYTHING to it just before the problem started, (such as clean the spark plug or adjust the carb)?

Was there any special circumstance that happened just before the problem started (such as riding through water or using a different gas or oil)???

Another thing you can check... Is there oil anywhere around the head gasket?? (leaking head gasket)?
 
N

Nnn

Member
Mar 15, 2018
115
4
18
50
Problem solved. All it was is a loose nut for the magnet. As soon as I retightened it the engine was as good as new. It won’t idle now but that’s because the engine is acting like the mixture is too rich for some reason after I tightened down the nut. Fuel economy still sucks though
 
  • Like
Reactions: wheelbender6 and Venice Motor Bikes
Tyler6357

Tyler6357

Well-Known Member
Mar 15, 2012
1,293
294
83
Santa Barbara, CA
Nnn said:
Problem solved. All it was is a loose nut for the magnet. As soon as I retightened it the engine was as good as new. It won’t idle now but that’s because the engine is acting like the mixture is too rich for some reason after I tightened down the nut. Fuel economy still sucks though
Click to expand...
Awesome that you figured it out, you could try some blue loctite on the screw so it don't vibrate loose again. Also, set your carb clip to the leanest setting, if it's still too rich, try a smaller jet.
 
crassius

crassius

Well-Known Member
Sep 30, 2012
4,032
158
63
USA
Did you check that the woodruff key that controls the timing is still in there?
 
You must log in or register to reply here.
Top Bottom