Ok last question I promise......

[Knutz]

I've asked a few questions bout my bike here and received some good tips......so first I want to say thanks to all who have offered advice.

So I put a new ECM on my xb9r and burned the maps from my race ECM to it and it's running pretty good. After about 300 miles today the engine light never came on and the bike ran pretty damn good........but,

The only problem is when I roll on the throttle pretty good at around 3500-4000 rpms I'm getting some pretty good spark knock. I'm pretty sure it's not the gas , it's never really done that before but I noticed it while driving to work this week and it continued today. Is this something that I can help with better mapping in the ECM or something else? It's an 03 xb9r with full race exhaust, K&N with modded air box and I'm running the race fuel and timing maps.

 

[user_deleted]

has the timing gone astray on its own? trigger behind round cam cover buell logo on your model. plenty of posts on here regarding how to check it. i would before you proceed with anything else.

http://www.buellxb.com/Buell-XB-For...s-CityX-XB12Scg/Static-timing-how-to-checkset

 

[rchuff]

If you mean pinging you might want to check your AFV and ego correction. See where it is at and get back to us you might have to move it up a bit.

 

[Chicknstripn]

Simple things first.... How's your oil level?
Second are you running 91 or higher octane fuel? It's been posted before that low octane fuel can cause pinging. If that's what you're experiencing.
Does your air box mod have a catch can for the crankcase breathers? If so, make sure it's not full or stopped up.
Also check all the fasteners under the airbox and all around the bike. These motors shake and rattle so much that any little thing being lose can sound quite odd. If all that checks out good then I'd check the follow the advice of the previous posts