Modified Gx340 Drag Bike

Tommyf

Tommyf

New Member
#1
#1
Here is a scratch built frame I just finished after recieving so much input on my last thread and was wonder what everybody thought. Not quite sure how much hp it has but I think it will do 7000+ rpms.

Here is a list of mods that have been done.

Gx340 clone-
Cam .360" lift and 260* duration at .050" lift.
Port and polished head. Milled @0.60
Oversized stainless valves
Chrome moly push rods
Honda lifters
1:3 Roller rockers
55 lb springs
Billet rod
1" exaust
34mm Mukini carb, 210 jet
Buller clutch, black springs and 16 tooth drive sprocket
Billet adjustable flywheel @ 27 degrees advanced
Steel head gasket
72 tooth axle sprocket

Also was wondering if there was any mini bike races going on in the San Fernando Valley?
 
Last edited:
graygoose420

graygoose420

New Member
#2
#2
Tommyf said:
Here is a scratch built frame I just finished after recieving so much input on my last thread and was wonder what everybody thought. Not quite sure how much hp it has but I think it will do 7000+ rpms.

Here is a list of mods that have been done.

Gx340 clone-
Cam .360" lift and 260* duration at .050" lift.
Port and polished head. Milled @0.60
Oversized stainless valves
Chrome moly push rods
Honda lifters
1:3 Roller rockers
55 lb springs
Billet rod
1" exaust
34mm Mukini carb, 210 jet
Buller clutch, black springs and 16 tooth drive sprocket
Billet adjustable flywheel @ 27 degrees advanced
Steel head gasket
72 tooth axle sprocket

Also was wondering if there was any mini bike races going on in the San Fernando Valley?
Click to expand...



Bike looks good . It should really get going .
Lots of racing in LA every Saturday. I don't know about sfv. There's a tournament this Saturday for the small blocks on gas. Lots to see.

Good job on the build. :thumbsup:
 
pro69nova

pro69nova

New Member
#3
#3
Tommyf said:
Here is a scratch built frame I just finished after recieving so much input on my last thread and was wonder what everybody thought. Not quite sure how much hp it has but I think it will do 7000+ rpms.

Here is a list of mods that have been done.

Gx340 clone-
Cam .360" lift and 260* duration at .050" lift.
Port and polished head. Milled @0.60
Oversized stainless valves
Chrome moly push rods
Honda lifters
1:3 Roller rockers
55 lb springs
Billet rod
1" exaust
34mm Mukini carb, 210 jet
Buller clutch, black springs and 16 tooth drive sprocket
Billet adjustable flywheel @ 27 degrees advanced
Steel head gasket
72 tooth axle sprocket

Also was wondering if there was any mini bike races going on in the San Fernando Valley?
Click to expand...
Sweet man:thumbsup:

Couple Things, Gas or Alky? are they dual springs, or the singles ?

The gearing is kinda low, i normally run a 3.56 for the 1/8th and spin 9300rpm...thats a 16/57 gear. the quarter it was 19/57 which was a 3.00, and spun 9340.

Exhaust is on the small side, primary should be 1.125id and step up from there..

16/72 be kinda wild on the hit, but would top out fast....

Im in the valley, Granada hills, and always in the Garage working on motas, got lots of Big block experience, if you ever need some assistance...:thumbsup:
 
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