Post by mikeley on Aug 27, 2013 14:05:33 GMT 1
Having run the bike in and not gone above 6000 rpm or into the power band for a couple of hundred miles, I've now discovered I have a detonation problem. If I run the bike around my local 30/40 mph roads it seems fine but when I take it onto the dual carriage way as soon as I get up to 6500/7000 rpm in 6th gear at about 55mph it sounds awfull and loses power. At this time the temperature has also risen to three quarters or just over on the gauge. When riding around the streets it seems to stay around the half way mark.
The first time this happened I also had what I think was coolant leak onto my boots so today I took the head off to replace the cheap gasket with a Yamaha genuine one. I found that the top of the piston had some light marks in the centre where it had over heated and started to melt. I am also going through spark plugs like no tomorrow. The bike won't start on the kick start unless you use a new one? It will bump start though.
I do currently have a chrome radiator grill. Could this cause the over heating resulting in detonation?
The carb has a 210 main jet, standard filter and all speed exhaust.
Please help.
The first time this happened I also had what I think was coolant leak onto my boots so today I took the head off to replace the cheap gasket with a Yamaha genuine one. I found that the top of the piston had some light marks in the centre where it had over heated and started to melt. I am also going through spark plugs like no tomorrow. The bike won't start on the kick start unless you use a new one? It will bump start though.
I do currently have a chrome radiator grill. Could this cause the over heating resulting in detonation?
The carb has a 210 main jet, standard filter and all speed exhaust.
Please help.
