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GPz1100 A head on to Gpz1100B barrels
Posted: Thu Apr 10, 2008 12:31 pm
Author: martinz1000r
Would the head from a GPz1100A (unitrack) fit straight on to barrels and bottom end of GPz1100b engine?
Posted: Sat Apr 12, 2008 11:01 pm
Author: chris41
Not exactly sure, it will fit no problems just check piston clearance the unitrak is a more closed chamber some times referred to as a bath tub chamber and the uni track pistons are a 18mm wrist pin so they wont go on the J or B rods. I actually prefer the A3 A4 head but thats always a good way to start an argument with Kawi engine builders .
I just compared an Arias J head 1166 piston against Wiseco 1166 A3 piston and it looks like it wont be a problem as the unitrak one is quite domed but it would pay to check. Maybe so-one has already done this.
chris
Posted: Sat Apr 12, 2008 11:55 pm
Author: london calling
With the uni-trak having 18mm wrist pins,this means a fractionally longer piston throw
But you're going the other way,so you'll get less compression me thinks
I'm pretty sure that Big Green Bust has got a uni-trak head on a 17mm bottom end and it's not 100% correct.
Posted: Sun Apr 13, 2008 5:35 pm
Author: martinz1000r
Thanks for the advice! I might just use the cams as I am told that they work really well on the earlier engines with a little gas flowing to the head.
Posted: Sun Apr 13, 2008 6:25 pm
Author: big green bus
I had a z1000j with a uni-trac head on the compression was shit but nothing hit, valves etc, chris is right , but i think if you fitted a B model 1170 kit you may run into trouble, DEBBEN PREFORMANCE is the place to ask questions. i was told that you could not do fit one but the z1000j ran fine.