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Heads and Cylinders
All about your porting, compression, rings, cylinder and piston modifications to your bicycles engine
Forums
Motorized Bicycle Mechanical Components
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49cc or 80cc base gasket size?
copmagnet80cc
May 3, 2014
Replies
6
Views
5,333
May 5, 2014
Theon
T
Finding stroke length?
copmagnet80cc
May 2, 2014
Replies
3
Views
2,213
May 3, 2014
Theon
T
Piston skirts/sides are somwhat black
copmagnet80cc
Apr 23, 2014
Replies
10
Views
2,031
Apr 25, 2014
Greg58
M
new ring on my piston, do i need to break in?
motorized kodiak
Nov 22, 2013
Replies
7
Views
3,226
Apr 25, 2014
mrfubs
S
time for new cylinder and piston/rings?
slayer60973
Apr 24, 2014
Replies
3
Views
1,429
Apr 24, 2014
dodge dude94
S
just ordered a Fred head. questions before install.
slayer60973
Apr 18, 2014
Replies
10
Views
3,534
Apr 23, 2014
mapbike
F
Is my cylinder in bad shape?
fischer550
Apr 8, 2014
Replies
15
Views
2,441
Apr 22, 2014
maniac57
Wasted Super Rat Jug & Piston
SuperDave
Apr 20, 2014
Replies
2
Views
1,756
Apr 22, 2014
SuperDave
Jug I found
mapbike
Mar 30, 2014
Replies
3
Views
1,479
Apr 18, 2014
mapbike
S
Stripped Cylinder Studs
SpAsTicJaX
Mar 9, 2014
Replies
15
Views
8,125
Apr 17, 2014
paintgun
it just came out lol
twostrokejimmy
Mar 23, 2014
Replies
5
Views
1,530
Mar 23, 2014
twostrokejimmy
Bent fins
rocksalt27
Mar 10, 2014
Replies
6
Views
1,866
Mar 11, 2014
Going2Hell
G
R
High vs Low compression question
ratman150
Feb 19, 2014
Replies
15
Views
9,909
Mar 9, 2014
Theon
T
I finally blew one up.
maniac57
Feb 16, 2014
Replies
14
Views
3,150
Feb 22, 2014
Mike B
E
ive duhsploded my piston rings!!
Elixys
Sep 24, 2010
Replies
16
Views
4,941
Feb 8, 2014
Theon
T
B
Piston needle bearing keeps failing.
borntofli
Aug 10, 2013
Replies
10
Views
4,398
Jan 21, 2014
maniac57
F
Cracked Cylinder Head
FractaL64
Jan 14, 2014
Replies
2
Views
2,561
Jan 14, 2014
2door
dax lower transfer ports vs LEB PK-80 lower tranfer ports big difference
mapbike
Jul 24, 2013
Replies
3
Views
2,914
Dec 27, 2013
flybytaco
Compression Leak
Dave31
Aug 15, 2013
Replies
9
Views
3,879
Dec 24, 2013
2door
W
thick head gasket
waldo11
Dec 16, 2013
Replies
6
Views
4,185
Dec 17, 2013
waldo11
W
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Motorized Bicycle Mechanical Components
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