T&E Grubee Jackshaft for Fat Tire Bikes

[Pugs75]

Hey All,
Ive got a new Seat post jack shaft kit coming from Grubee for the fat tire bikes. I recently built a strech cruiser fat tire bike and the biggest issue I had was the tire/chain clearance. I had to get an offset motor mount and some custom fabricating to get it to work.
My biggest issue was after mounting was a really bad vibration throughout the whole bike, which is due to the offset motor mount. It limited my speeds to 15-20mph due to the vibration. The bike is soo damm cool that I have been dealing with it and trying to come up with a way to stop the vibration, hence the new jack shaft Grubee is making.
I think this might cure the vibration issue, I noticed when I ride if I put my foot on the side of the motor and put some pressure on it the vibration stops so It should work. They look pretty well thought out and if it works I will be a happy man. This is my bike as it stands now, I will take some photos as I install the kit.

 

[Chainlube]

Did you balance the engine?

 

[GW's Motorized]

That bike is begging for a much larger engine, too bad no one sells that big of an engine

 

[Pugs75]

Did you balance the engine?

I did not balance the crank, way too much work. but im sure it will have way less vibration if at allany after it attached to the seat post part of the frame.

Did you balance the engine?

 

[Pugs75]

That bike is begging for a much larger engine, too bad no one sells that big of an engine

It sure does, I almost did a four stroke but opted for the 2

 

[GW's Motorized]

It sure does, I almost did a four stroke but opted for the 2

Four strokes just don't look as purdy. Don't get me wrong your bike is purdy too. I like purdy bikes, here is mine.

 

[Sidewinder Jerry]

Four strokes just don't look as purdy. Don't get me wrong your bike is purdy too. I like purdy bikes, here is mine.
View attachment 193805

Depends on what 4 stroke you're talking about.

 

[Wrench]

Hey All,
Ive got a new Seat post jack shaft kit coming from Grubee for the fat tire bikes. I recently built a strech cruiser fat tire bike and the biggest issue I had was the tire/chain clearance. I had to get an offset motor mount and some custom fabricating to get it to work.
My biggest issue was after mounting was a really bad vibration throughout the whole bike, which is due to the offset motor mount. It limited my speeds to 15-20mph due to the vibration. The bike is soo damm cool that I have been dealing with it and trying to come up with a way to stop the vibration, hence the new jack shaft Grubee is making.
I think this might cure the vibration issue, I noticed when I ride if I put my foot on the side of the motor and put some pressure on it the vibration stops so It should work. They look pretty well thought out and if it works I will be a happy man. This is my bike as it stands now, I will take some photos as I install the kit.

View attachment 193803

Yeah, get that jackshaft kit for the fat tire bike that should make everything good
Squarely mount that engine to the frame like it should be
Your offset mount is causing unnecessary vibrations

 

[Wrench]

Whizzer 138cc Flathead 4 stroke is a nice looking engine

 

[DAMIEN1307]

Whizzer 138cc Flathead 4 stroke is a nice looking engine

It even looks like I could easily mount that on my frame...lol...You can send that to me along with the Rad Rover I am still waiting by the mail box for these last two years...lol.