Topend build and a little info

[magz]

ok, so i've been doing compression test on my banshee since i got it, i start with about 145psi - (autozone gauge) when i started ealier this year. iv rode with several diffrent filters on and the worse was my K&N with proflow i always saw small sand particles behind it. anywho

 

left right

Started with 145 148

last test i did 118 120

 

 

The bike still ran pretty damn good,i could pull wheelies in the first 3 gears(which isnt saying much cause i suck at wheelies) it just didnt feel like my buddys who felt alot stronger and he has t-5 w/ 20cc domes. am i just dumb for pulling it apart even though it still ran good?

 

bike has a 20cc domes in it. and im at 700 elevation. previouse owner when i baught it stated it had

 

" trinity +5 mm crank and rods with wiesco forded pistons in it. All the motor seals where replaced i put a new impellar and clutch in it. It has a new cool head 19cc domes, v-force 3 reeds. t-6 toomey pipes"

 

which the only thing i can verify now is that it does have v-force 3s, the pipes and does have 20cc domes and not 19.

 

anywho back on subject, bike ran good i just felt it had low compression for what its supposed to. since it still ran good should i just re-ring the pistons and get a good hone job done? or should i have it bored & honed and a new set of pistons and rings? here are some picture and let me know what you think.

 

also how can i identify these pistons, there are no markings on top. i used my digital calipers and measured the cylender and it said 64.40 and bounced around between 64.39 does that mean its bored .40 over?

 

cool head picture

 

domes

 

left side cylender

 

right side cylender

[magz]

also running stock carbs with 320 main and K&N pods and 25 pilots incase anyone needs to know.

[magz]

also running stock carbs with 320 main and K&N pods and 25 pilots incase anyone needs to know.

 

 

:ermm: anyone

[dajogejr]

My advice....get a better gauge...to be sure.

Craftsman (60 bucks for a motor cycle/small engine tester kit) Snap On, MAC, Matco...

 

I won't trust auto store cheapy compression testers. I've seen them vary 30 to 50 lbs per cylinder compared to the snap on gauge I use....

 

Might be a hair fat on the jetting somewhere, but overall the inside of that motor looks pretty clean....

[mopar1rules]

if you measured 64.40, it means you are bored .020" over.