Bikeberry 2-stroke on a 2001 Specialized Enduro Expert HT?

copperocks

copperocks

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Hello,
I currently have a bikeberry 2-stroke engine (https://www.bikeberry.com/products/66-80cc-bbr-tuning-angle-fire-bicycle-engine-kit-2-stroke) installed on an old schwinn beach cruiser (see photos). While it looks great, the rim brakes feel unsafe to me.
I recently picked up a 2001 Specialized Enduro Expert HT bike with really nice Hayes hydraulic disc brakes. I followed the directions in this Bikeberry Video (
View: https://www.youtube.com/watch?v=NR8-IcrbwaI&list=PLgfDu9ei_yw8RdclSgGGbfowhiVWqTcj8&index=18). While the cardboard cut out fit in the frame, when I sized the cut out against my engine, it didn't seem to account for the carburetor.
Wondering if anyone has any experience with these engines and can tell me if its worth trying. I'd rather not uninstall the engine from my current build just to find that it doesn't fit the new frame.
I measured the new frame and added the measurements to a photo below. Approximately 20" on the bottom of the frame, 17" on top and 12" on the seat tube side.
Thanks,
Kai
 

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copperocks said:
Hello,
I currently have a bikeberry 2-stroke engine (https://www.bikeberry.com/products/66-80cc-bbr-tuning-angle-fire-bicycle-engine-kit-2-stroke) installed on an old schwinn beach cruiser (see photos). While it looks great, the rim brakes feel unsafe to me.
I recently picked up a 2001 Specialized Enduro Expert HT bike with really nice Hayes hydraulic disc brakes. I followed the directions in this Bikeberry Video (
View: https://www.youtube.com/watch?v=NR8-IcrbwaI&list=PLgfDu9ei_yw8RdclSgGGbfowhiVWqTcj8&index=18). While the cardboard cut out fit in the frame, when I sized the cut out against my engine, it didn't seem to account for the carburetor.
Wondering if anyone has any experience with these engines and can tell me if its worth trying. I'd rather not uninstall the engine from my current build just to find that it doesn't fit the new frame.
I measured the new frame and added the measurements to a photo below. Approximately 20" on the bottom of the frame, 17" on top and 12" on the seat tube side.
Thanks,
Kai
Click to expand...

It is NOT going to fit on its own and it only might fit with some extreme modifications which would mean some heavy duty welding and thats with the frame being steel, NOT aluminum.

That bike is NOT a good choice for building a motorised bike, No Way, Jose, No How...lol.
 
You would be better off to just change your rims to the same type of mag wheels I got from bikeberry a few years ago that already come with disk brakes and rotors included along with a 36 tooth rear sprocket so you do not have problems getting your rear caliper to fit in the space needed by too large a rear sprocket.

Here is my beach cruiser to give you a general idea of what I did.

DSCN0229.JPG
 
With a bit of work you can swap those wheels from the mountain bike to your cruiser. The forks might even bolt right up on the front. If you can't fit the rear disc you can run a rim brake in the rear just fine. Cruiser frames are much better to build on than mountain bikes.
 
Gordy said:
With a bit of work you can swap those wheels from the mountain bike to your cruiser. The forks might even bolt right up on the front. If you can't fit the rear disc you can run a rim brake in the rear just fine. Cruiser frames are much better to build on than mountain bikes.
Click to expand...
Unfortunately the cruiser doesn't have the mounting holes for a disc brake
 
copperocks said:
Unfortunately the cruiser doesn't have the mounting holes for a disc brake
Click to expand...
My Hyper beach cruiser and Gordy's Hyper don't have the built in mounting holes on the frame for disk brakes either.

We both made our own adapters.

Here are mine...The front one is an "Adel" clamp from an F-16 fighter jet, (civilian versions can be found online as well).

DSCN0189.JPG


The rear one is handmade and made in such a way that it is not only screwed into existing holes in the dropouts of the frame but the bottom part is kind of like a fork that fits over the axle and is held in place when the axel nuts are tightened...It also uses the back most part of the frame to brace it solidly in place...It is made from 7075 T-6 military aircraft grade aluminum.

Fabricated Rear Caliper Adaptor IMG_0347.jpg


Another view of rear caliper adaptor.IMG_0350.jpg


@Gordy hand made his as well when he sees this he will tell you what readily available material he made his from.

If your gonna be in this hobby/sport of building motorised bikes, you will need to know how to think outta the box as nothing is just a bolt on part on these without some sort of adaption needed to make these things...lol.
 
copperocks said:
Unfortunately the cruiser doesn't have the mounting holes for a disc brake
Click to expand...
DAMIEN1307 said:
My Hyper beach cruiser and Gordy's Hyper don't have the built in mounting holes on the frame for disk brakes either.

We both made our own adapters.

Here are mine...The front one is an "Adel" clamp from an F-16 fighter jet, (civilian versions can be found online as well).

View attachment 221781

The rear one is handmade and made in such a way that it is not only screwed into existing holes in the dropouts of the frame but the bottom part is kind like a fork that fits over the axle and is held in place when the axel nuts are tightened...It also uses the back most part of the frame to brace it solidly in place...It is made from 7075 T-6 military aircraft grade aluminum.

View attachment 221782

View attachment 221783

@Gordy hand made his as well when he sees this he will tell you what readily available material he made his from.

If your gonna be in this hobby/sport of building motorised bikes, you will need to know how to think outta the box as nothing is just a bolt on part on these without some sort of adaption needed to make these things...lol.
Click to expand...
You can swap the front forks and use rim brakes on the rear and just use the disc mounts on the hib for a sprocket (much more reliable than a rag joint), or if you want rear discs do like Damien and I have already done. I made my adapter (and many other parts) out of a 1/4" thick piece of 6065 aluminum that was a toggle switch panel in a racecar. Completely free to me.
IMG_20241013_204332578.jpg
 
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