Title: GX120 TierIII Question Post by: odogracing on March 23, 2009, 08:52:10 PM I have a question maybe someone can help. I upgraded my 120 with a TierIII flywheel. While doing it I had to loosen the magnedo and slide it over to install the new fly wheel. After installing I set the gap clearence using a match book (old flat head trick), well after bolting the motor back in place, I now have a slight miss on throttle. My question is, would the timing have to be reset as a result of the adjustment? I've heard of people just bolting on and going. I also replaced valve springs, but double and tripple check the valve lash and it's fine. Any help? Note, the motor was responsive before changing the flywheel.
Thanks, Tim Title: Re: GX120 TierIII Question Post by: joeblow on March 23, 2009, 10:12:20 PM use a filler gauge set top and bottom at about .010 thanks www.maxhp.net
Title: Re: GX120 TierIII Question Post by: odogracing on March 24, 2009, 08:25:43 AM Thank you. Would this cause my hesitation problem?
Title: Re: GX120 TierIII Question Post by: heimboyz89 on March 24, 2009, 09:59:03 AM Whas the motor at the old timing before (24/26 degree)? And is it a restricted motor? Most of the restricted motors I have seen with the 20 degree timing have a definate bog when you crack the throttle on the pit cart but seem to be fine on the track when they get wound up to speed.
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