Performance Mods

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Motorized bicycle performance modifications. Carbs, porting, exhausts, expansion chambers, reed valves, boost bottles and everything to make your motorized bicycle go really fast.
G
PUCH HEAD on HT?
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4
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2K
Deleted member 12676
D
L
Newby... Need peoples opinions.
Replies
4
Views
916
Steve Best
Steve Best
F
Dellorto SHA Clone - Fuel circuit schematic
Replies
4
Views
4K
Fabian
F
canalcat
New ride thanks
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4
Views
3K
HeadSmess
HeadSmess
J
power additions
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4
Views
2K
5-7HEAVEN
5
R
expansion chamber or dirt/pit bike exhaust muffler??
Replies
4
Views
3K
HeadSmess
HeadSmess
M
Expansion chamber
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4
Views
1K
Wrench
Wrench
Waxxumus
Need some info on high compression (Fred) Head
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4
Views
1K
Waxxumus
Waxxumus
jumpjr619
What do I need
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4
Views
1K
Karl Snarl
Karl Snarl
steelfan41
Expansion Chamber vs Poo Poo Pipe
Replies
4
Views
3K
adrian101
adrian101
herbilious
Performance carb woes
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4
Views
2K
herbilious
herbilious
5
Anyone Narrow A Rear Wheel Hub?
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4
Views
1K
BigBlue
B
Spare_Parts
Adding boost port
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4
Views
3K
Spare_Parts
Spare_Parts
K-Ryder
How is it possible to be this fast?
Replies
4
Views
2K
philski
philski
motorpsycho
anyone here tried the spookytooth expansion chamber?
Replies
4
Views
1K
motorpsycho
motorpsycho
D
Port Durations for Reed Valved Engine?
Replies
4
Views
843
mihkelson
M
D
  • Locked
Correcting the NT and Speed carbs
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4
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2K
extremeodd
E
P
Performance upgrades
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4
Views
3K
5-7HEAVEN
5
T
  • Locked
Serious 49cc mods
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4
Views
4K
Deleted member 12676
D
G
(CNS series 2), or older "Speed Carb?"
Replies
4
Views
1K
geebt48cc
G
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