HMF full sytem
#1
HMF full sytem
I just installed a HMF full system on my BF750. The recommended adjustments after changing out the jets that it came with was 2-1/2 turns out. After test riding, it was backfiring after I let off of full throttle. So after adjusting more, I ended up at 3-1/2 turns out, with less backfiring, but it is still there. It's running good but still backfiring off full throttle, is this normal or do I need to adjust more?
#3
#5
HMF full sytem
yes, the popping is more annoying than any thing else. Just make sure your engine is not running to lean as this is damaging. Smell the exhaust and you should be able to determine if it's too lean or too rich. Black inside the muffler will indicate too rich. Also try and check for exhaust leaks as they can cause the popping.
#7
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#10
HMF full sytem
Originally posted by: jawyatt
With that new HMF full system could you tell much power difference and does it sound
alot better. Also did you change the jetting to the recomendations that HMF put out.
With that new HMF full system could you tell much power difference and does it sound
alot better. Also did you change the jetting to the recomendations that HMF put out.