Tuning help or troubleshooting

wikstromm

wikstromm

Washed up hillbilly
Location
SE
Got some problem at WOT and only WOT high rpm that it sputtering/ runs rough.
Tried all kinds of different main jets sizes with no difference, put some additional grounding, didnt help either, kind of stuck now, bad brain or bad coils?
Xs1000
Rrp pipe
Msd tl
Dasa48s pilot 125, main at 132.5 now, good color on plugs
Br8es

Its a fresh build for me

Any ideas?
 
JC-SuperJet

JC-SuperJet

Location
Texas
Make sure the MSD Coil Grounds are clean and tight.

I used to have to clean and tighten the MSD Coils' Grounds and Bolts every season. If I didn't, would start having misfiring spark issue at/near WOT.

White chalky corrosion would build up and cause the missing spark symptoms.

Could also use a different Channel on the MSD Brain since it comes with three channels and you are using two channels?

Check the Battery also. Or try a known good one.

The Pulse Pick-ups could be loose or the wires could be cut/shorting out right where it goes thru the Stator Plate Hole.
 
Jcary85

Jcary85

Site Supporter
Location
Glenmoore pa
got any videos? Would maybe help to hear it. Maybe check air gap to pickups. Is the problem at full throttle on a trick like a backflip or are you trying to go all out at full speed? If it’s an at speed full throttle pull, is it immediate or does it get worse over time?
 
wikstromm

wikstromm

Washed up hillbilly
Location
SE
I added additional coilgrounds and engine ground just to be sure, no difference.
Got a brand new noco lithium battery

Its when I pull full throttle for like a jump etc, it revs up but sputtering/ roughly.
Idle and mid is fine after i letgo of throttle and runs just fine
 
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