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Old 03-26-2013, 09:35 PM   #1
andrewrides1   andrewrides1 is offline
 
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big bore head or not

ive had a 80cc kit in for awhile. should i upgrade the head. will it give me a speed boost.



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Old 03-27-2013, 09:53 AM   #2
millsc   millsc is offline
 
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The big VALVE head will improve performance, the big bore head with stock valves will just lower compression and decrease performance.
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Old 03-28-2013, 04:17 PM   #3
andrewrides1   andrewrides1 is offline
 
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OK that is what I've been looking at the big valve head. another thing is they say to check the valve to piston clearance what do i do if it is too tight, if anything? or should i just throw it on and hope i'm lucky? what do you think?



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Old 03-29-2013, 01:18 AM   #4
millsc   millsc is offline
 
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use two base gaskets
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B.A.M.F. tapout scoot
24mm carb 150cc intake
performance exhaust A9 cam
hoca big valve head 16/50 gears
9.25 gram dr pulley sliders koso variator 1.5k torque spring
orange coil orange unlimted cdi
uni filter
gates premium belt
2012 taotao vip cy50a scrappys 110cc big bore kit 52mm "88cc"
100 main jet 38 idle iridium plug custom paint, leds and decals alarm system
naraku hd crankshaft
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Old 03-29-2013, 03:42 PM   #5
andrewrides1   andrewrides1 is offline
 
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thanks



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Old 03-29-2013, 06:58 PM   #6
bloodymomo   bloodymomo is offline
 
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I need one baddd
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Old 03-30-2013, 11:42 PM   #7
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Quote:
Originally Posted by millsc View Post
use two base gaskets
Adding 2 base gaskets also lowers comp.
You should always check for piston to vavle clearance
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Old 03-31-2013, 01:36 AM   #8
andrewrides1   andrewrides1 is offline
 
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Quote:
Originally Posted by dude View Post
Adding 2 base gaskets also lowers comp.
You should always check for piston to vavle clearance
brilliant.
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Old 03-31-2013, 09:22 AM   #9
millsc   millsc is offline
 
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I have two base gaskets on my 52mm kit with a9 cam and big valve head, i think if i used one the electric starter wouldn't start it, due to the compression
__________________
B.A.M.F. tapout scoot
24mm carb 150cc intake
performance exhaust A9 cam
hoca big valve head 16/50 gears
9.25 gram dr pulley sliders koso variator 1.5k torque spring
orange coil orange unlimted cdi
uni filter
gates premium belt
2012 taotao vip cy50a scrappys 110cc big bore kit 52mm "88cc"
100 main jet 38 idle iridium plug custom paint, leds and decals alarm system
naraku hd crankshaft
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