4 stroke advise

Jeremy · Nov 1, 2012

I have had for a while a 2 stroke bicycle engine and the engine is going dead and I want to now since I have the funds to purchas s four stroke kit but 4 strokes are new to me I need help to decide which kits are the best and were to get it at. Also would like any great pointers you guys would like to provide to help it last as long as possible. And just some heads up, ect.

Thanks,
Jeremy Boyll

MotorBicycleRacing · Nov 1, 2012

Jeremy said:
I have had for a while a 2 stroke bicycle engine and the engine is going dead and I want to now since I have the funds to purchas s four stroke kit but 4 strokes are new to me I need help to decide which kits are the best and were to get it at. Also would like any great pointers you guys would like to provide to help it last as long as possible. And just some heads up, ect.

Thanks,
Jeremy Boyll

The new shipment of Grubee 4G gearbox equipped kits is the best bang
for the buck and Bicycle Engines is a good company to deal with.

http://www.bicycle-engines.com/49cc-4G-T-Belt-Drive-Complete-Gas-Powered-Engine-Kit.html

Don't be tempted by slightly cheaper 4 stroke kits because they have
inferior gearboxes even though they use the same hausheng engine or
the engine differs in the shaft output and will limit you in future upgrades.

A lot of reading in the 4 stroke forum will give you the pointers.

Jeremy · Nov 1, 2012

Which one is better the four stroke 4g T or the four stroke stage III?

MotorBicycleRacing · Nov 1, 2012

I just said the Grubee 4G and gave you the link.

The Stage III looks better but the 4G is vastly superior.

Jeremy · Nov 1, 2012

Ok I'll take your word on it from what I've seen I already like the belt driven better then the gear on gear.

Thanks!

Pedalman · Nov 1, 2012

MotorBicycleRacing said:
The new shipment of Grubee 4G gearbox equipped kits is the best bang
for the buck and Bicycle Engines is a good company to deal with.

http://www.bicycle-engines.com/49cc-4G-T-Belt-Drive-Complete-Gas-Powered-Engine-Kit.html

Don't be tempted by slightly cheaper 4 stroke kits because they have
inferior gearboxes even though they use the same hausheng engine or
the engine differs in the shaft output and will limit you in future upgrades.

A lot of reading in the 4 stroke forum will give you the pointers.

Will it(kit w/o engine) work and fit the HF 79cc engine? Or lot of modifications necessary?

Venice Motor Bikes · Nov 1, 2012

I've had extremely good luck with the 4-stroke 'double roller chain' gear boxes!
The only thing that I don't like is the very low gearing of the stock rear sprocket; so I'm installing smaller 36t sprockets on all of my 4-stroke Isla Vista bikes these days for better street speeds.

MotorBicycleRacing · Nov 1, 2012

Pedalman said:
Will it(kit w/o engine) work and fit the HF 79cc engine? Or lot of modifications necessary?

I really don't think it would work.
Never seen it done before.

The_Aleman · Nov 2, 2012

Pedalman said:
Will it(kit w/o engine) work and fit the HF 79cc engine? Or lot of modifications necessary?

The HF79 has a much different bolt pattern and the 4G is not easy (or even practical) to adapt to it.
Also, the kit motor mount would need to be redrilled for the HF pattern and the kit cranks would not likely clear the engine.

If you need a decent tranny for the HF79, AGK's jackshaft would work nicely; for a little more money so would a Q-matic.

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4 stroke advise

Jeremy

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MotorBicycleRacing

Well-Known Member

Jeremy

New Member

MotorBicycleRacing

Well-Known Member

Jeremy

New Member

Pedalman

New Member

Venice Motor Bikes

Custom Builder / Dealer/Los Angeles

MotorBicycleRacing

Well-Known Member

The_Aleman

Active Member