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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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what size cc now
chmn22s
Sep 24, 2018
Replies
3
Views
1,756
Apr 23, 2019
chmn22s
R
Cylinder Porting
ronin62715sv
Jul 17, 2018
Replies
7
Views
5,382
Mar 19, 2019
javy mcdees
Porting First Time No Problem?
carl clack
Jun 29, 2018
Replies
0
Views
1,993
Jun 29, 2018
carl clack
M
Help carb/head combination
Miguel P
Apr 4, 2018
Replies
7
Views
1,329
Apr 13, 2018
CrazyDan
W
No fuel getting to top of piston
Wilder777
Dec 7, 2017
Replies
9
Views
3,137
Dec 19, 2017
Wilder777
W
B
The head bolt rod on my engine is striped.
bob1352
Nov 27, 2017
Replies
7
Views
1,194
Dec 2, 2017
crassius
D
GT90 Conversion Kit
doomedgame
Sep 25, 2017
Replies
7
Views
5,091
Nov 5, 2018
John420jones
J
Jet 66/80cc motor only from gasbike.net or kings motor bikes
jolfstn
Aug 12, 2017
Replies
2
Views
1,027
Aug 12, 2017
jolfstn
J
Slant head orientation
Jellyfish420
Jul 5, 2017
Replies
3
Views
1,512
Jul 6, 2017
xseler
D
Rings
doomedgame
Jun 23, 2017
Replies
3
Views
1,094
Jun 24, 2017
crassius
D
Modded pistons
doomedgame
Jun 18, 2017
Replies
2
Views
1,074
Jun 22, 2017
doomedgame
D
Hybrid cylinder engine options
mobike91
May 20, 2017
Replies
1
Views
1,628
May 24, 2017
Dan
S
49cc High compression head
shiveralex
Apr 16, 2017
Replies
4
Views
3,917
Apr 24, 2017
Tyler6357
New high comp head!
Cylon
Apr 14, 2017
Replies
13
Views
3,359
May 16, 2017
Cylon
High comp head.
Cylon
Apr 14, 2017
Replies
1
Views
1,050
May 15, 2017
mobike91
D
Mixing cylinder bodies?
dale_m
Mar 15, 2017
Replies
2
Views
2,206
Mar 16, 2017
sbest
D
headbolts with no nuts works great!!
daveet6666
Feb 12, 2017
Replies
3
Views
1,551
Feb 19, 2017
crassius
T
Compression
thumper68
Jan 17, 2017
Replies
2
Views
3,323
Jan 18, 2017
thumper68
T
F
Jets
Flathead
Nov 27, 2016
Replies
5
Views
3,715
Jun 4, 2017
Greg58
something to think about
crassius
Nov 17, 2016
Replies
2
Views
1,920
Nov 24, 2016
crassius
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Motorized Bicycle Mechanical Components
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