Update on Header and Jetting

junkyardhotrod at aol.com junkyardhotrod at aol.com
Mon Apr 19 22:46:03 PDT 2010

Hey John,

    I am currently running a 4 degree advancer, its not adjustable, dont remember what brand it is, I put it in a long time ago.
   When I first got my gpz it had a V & H ignition box, and after I had the bike about a month the tach quit, I found this was common with this box and V & H wouldnt or couldnt fix it, but the box has adjustable advance and rev limiter in it and it was set at stock rpm limit and 4 degrees advance. To get my tach back, I put the stock box back on and with the flat slides it wouldnt hardley run, had no throttle response and was hard to start, so I ordered up the advancer and have ran it that way since.
    I have thought about putting the V & H box back on to see how much I could get away with on pump gas, but the mikunis can load the engine harder than CV type carbs at low rpms so you would have to be careful of the ping, maybe next time I take it to the track I will take the other box and dump in some 111 and see how much difference advance makes.

Charles/Mike do you guys have advancers in your bikes?  It's free throttle
response up here at altitude.


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