Water cooling question

[Thephantom187]

I’m not new to motorized bikes but I am new to the water cooled motors and such. So this might be a silly question. Can you put a water cooled top end on a regular bottom end.

For example

This bottom end

YD100 Bottom End Crank Assembly of Gas Bicycle Engine kit

YD100 Bottom End Crank Assembly with improved magneto For YD100 engine kit only; cylinder body gasket and Bolts/Studs to fasten the cylinder are excluded; Replacment for YD100 kit; m8 studs for front and rear mount,wide front mount Crank installed well inside of bottom It is Complete bottom end...

gorillagasbike.com

With this top end

Kit 70 Ø47.6mm 2FAST aluminium minarelli am6 Engine preparation None

Sale, photo and kit description 70 Ø47,6mm 2FAST aluminium minarelli am6

www.rrd-preparation.com

I know I know, probably a stupid question but I’ve seen stuff online that makes it look possible.
I dont necessarily want to go the cheap route but if anyone has any recommendations for water cooled motors for my next motorized bike build that aren’t breaking the bank then please let me know, thank you!

 

[Mister Paco Paco]

Well yes and no. Those need a case reed conversion and a spacer to tun properly. The ones that bolt one roughly are the minarelli horizontal cylinders. And those go from 40mm to 61mm. The yd styl of bottom ends are 50x50 spacing so roughly the same as the Minarelli.

 

[Gordy]

You can. You'll need to make a cylinder spacer that includes coolant passages and run an electric water pump. It's been done a few times

 

[WEEDHOPPER420]

It's not a question of CAN it be done.
The question is HOW MUCH will it cost lol

 

[Thephantom187]

It's not a question of CAN it be done.
The question is HOW MUCH will it cost lol

Yeah exactly, it’s gonna cost a lot!