"several people have this issue now and a solution would be greatly appreciated"...okay....do some detective work then....what is the COMMON denominator(s) for 'several guys' that have this problem.
My bike ran great stock.Perfect.I bought the Brock's Full ti single CT.PCV...with a Brock's REVISED street map(first one 'bucked' as you say(secondaries removed as well).But only just off idle...at minimal speeds.Otherwise...ran great.Installed the Guhl flashed ECU...his first flash.Bike ran great.Rode er like that for several thousand miles.Recently installed a 43 rear sprocket.Bike runs great....no problems.Speedo is dead on...it WAS 3 mph off with the stock gearing.
Okay...so what is different here?When did the stumble with my bike appear?I switched ecu's at one point...I have a stock new factory ECU...for backup.Bike runs fine with either...except the Guhl's is more responsive...and gets better fuel mileage.Other than that...she runs fine with either.Smoothness is there...
Smokin added a very possible scenario with these bikes...the ECU MAY have to relearn the stock parameters again...or....correct for any changes as long as they're within the factory parameters...it may take some riding to do that.IDK....That's ONE possibility.You know the CAN unit is processing thousands of signals at any given time.It MAY need to take a bit of time to correlate the 'new' info with the ECU....who knows?I don't.But maybe?
It doesn't sound plausible to me that a ONE TOOTH change would cause a bike like this to perform enginewise so radically different.Mine is doing fine....so how is mine so different than the others who are having this issue?That I don't get.If my bucking deal was corrected with a revised fueling map....I wonder why so many are saying.."it can't be that"...That's what I don't get.Gearing?It wouldn't be much different(one tooth) than the bike 'having a traction problem"...that is...wheel speed difference.The programmed ECU parameter for the KTRC...I can't see how it would be being exceeded by a one tooth difference(causing the motor to restrict).And in fact....with mine...apparently it isn't.KTRC on '1'.Haven't tried any other settings with this 43 on there...I will though...just to see what she does.
IMO...it's not the gearing...it's something else.My guess...fueling...somehow.PCV...Wideband...whatever...something other than gearing.Those draggers aren't getting this...right?and they're changing gearing like crazy...right?You can only change so many things....you guys say.."I went back to stock gearing and it went away"...okay...I certainly can't say it didn't.There IS some guesswork going on here...lots of it actually.Saying.."somebody told me"...or..."I heard"...okay...fine...maybe.That doesn't equate to FACTS necessarily.Who one these forums actually KNOWS what the systems on the new bike are really capable of?What they do between each other.NOBODY.Not for sure.
But this driveability thing...mine was corrected...simply.Been good ever since.THE ONLY issue I began to hav over time...after installing all this stuff...was the backfire was beginning to appear.I checked the Pair block-off mod...the hose was indeed slipping loose from the blocked airbox hole.I blocked(again) the hose(this time IN the hose)(and checked the airbox block cap)...problem solved...no more roughness with that...no backfires...nothing.
I know this is gonna sound possibly insulting...I don't mean it that way...BUT....the left side airbox port IS the one these guys are blocking,yes?If they're not...it won't have very good driveabilty...and the gearing 'programs'(fueling,TPS) won't work right.(assuming the exhaust and such has been modified,remapped)...this came from Brock himself.I trust that to be true.
* Last updated by: Grn14 on 8/13/2012 @ 12:58 PM *