British Only Forums
British Only Forums
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 British Motorcycle Forums
 Triumph Motorcycles
 1968 T120R Bonneville
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

wpheaton

66 Posts

Posted - 08/06/2013 :  20:17:16  Show Profile  Reply with Quote
I have had my 68 Bonnie for about 5 years now. When I first purchased it, it started easily and idled perfectly. Last summer the left cylinder started to miss on start up but would smooth out as it warmed up. This summer the left is not firing at all. I have cleaned both carbs thoroughly. The left plug is sparking with a nice blue spark but the cylinder is not firing. What could I check next? It has the original points set-up. I have not checked the timing yet.

Bill

f scott dundas

Australia
253 Posts

Posted - 08/08/2013 :  18:59:02  Show Profile  Reply with Quote
If you have spark at the plug then it can only be a fuel blockage or maybe a sticky valve - i.e the exhaust or inlet valve is stuck open and you have no compression. However start with the easy stuff first swap the plugs over.If the left side starts with the plug out of the right it just may be a faulty spark plug. Good luck with it. Let us know how you go.
Scott
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
British Only Forums © British Only Motorcycles & Parts Inc. Go To Top Of Page
This page was generated in 0.08 seconds. Snitz Forums 2000