hello, i am getting a pinking noise like my raptor is firing too early, this only happens when i am in slightly too high a gear for the speed i am doing, if i open the gas and put load on the engine it sounds like valve pinking, i have checked timing at 1400 rpm - all ok, i have checked petrol strength - all ok, i have checked the plug also, the bike runs fine apart from that, i took it out earlier and it didn't do it, later on it started again, definately sounds like the timing is too far advanced, could it be something electrical breaking down that only shows up when i put load on the motor when going too slow, but doesn't show up on the normal timing check ?
oh yeh - adjusted valves today as well and this made no difference?
dave

 

hmmm

is the raptor new to you?

or did you buy it new,,,,,and it just started doing this recently?

 

happy christmas !!!
the raptor is an 02, i have had it for 6 months and it started doing it about 2 weeks ago, i have just fitted a stage 2 dyno, with 148/148 mains, open airbox, scorpion race system and i am running at sea level
dave

 

Merry New Year!!!

Any reason why you are running identical mains,,,,,or was that a typo?

 

sorry buddy, typo, 146/148

 

are you sure its too lean, as it says 146/148 for my setup in the instructions?

 

Dynojet sucks, i have the kit on my 350 and im having issues, they kit told me to run a 132 main, a 138 with the lid off, im currently running a 140 main with the lid on, don't go by those instructions.

 

thanks mate, will running too lean cause pre detonation?

 

You're not too lean, thats what dynojet recommends for the stage two set up. Try a higher octane fuel.

 

i'm running 97, i was running this weeks ago, but the sound has only just started