ebay engine

[tgus3]

you guys think i could make this work on a mini bike? https://www.ebay.com/itm/49CC-RACIN...ash=item2ef3cdb508:g:eW4AAOSwGtRXyOoW&vxp=mtr
12000 rpm over 4hp...but i cant find the shaft size
lokks like id have to get a exhaust for it..im just looking for a small cheap engine to fit in my little minibike that basically bolt and go.

 

[ezcome-ezgo]

My opinion:

A) No way that is producing 4hp, or even close.
B) That motor has zero torque, only rpm's.

 

[tgus3]

My opinion:

A) No way that is producing 4hp, or even close.
B) That motor has zero torque, only rpm's.

yes but this is a tiny bike itll fit my younger bros better than me. all i want is for it to go. other wise id have put my predator on.

what im worried about is how simple is it to put on the bike cause i have a 35 sprocket on and dont really want to get another...

 

[ezcome-ezgo]

7000-12000 RPM is a different animal. Calling Dr. Bob!

 

[NewbCarter]

yes but this is a tiny bike itll fit my younger bros better than me. all i want is for it to go. other wise id have put my predator on.

what im worried about is how simple is it to put on the bike cause i have a 35 sprocket on and dont really want to get another...

Dont quote me on this but i think these are all zenoah engine clones , thus should have a standardized bolt pattern.

I had an R/C car with one of them , but 26cc and around 4HP (18k RPM+). and it was a rocket ...

On a mini bike .. im not sure ... probably would need some very short gearing to not burn up the clutch ...

Exhaust side of things , those "can" type exhausts should fit .

EDIT : interesting to see a crankcase-reed induction setup on a chinesium engine ..

 

[65ShelbyClone]

but i cant find the shaft size

You won't unless you buy one; that engine already has a clutch on it.

I think you'd be money ahead getting a 4-5hp four cycle engine instead. The torque will make a minibike much nicer to ride.

 

[tgus3]

You won't unless you buy one; that engine already has a clutch on it.

I think you'd be money ahead getting a 4-5hp four cycle engine instead. The torque will make a minibike much nicer to ride.

yeah ill prob just get the lil predator but I wanted to get a smaller one because I don't think even that the 79cc predator with the gas tank will fit..oh well

 

[itsid]

My opinion:

A) No way that is producing 4hp, or even close.
B) That motor has zero torque, only rpm's.

I disagree in parts..
50cc 4hp isn't exactly complicated on a two stroke,
and while those engines are indeed amongst the cheapest out there, I'd still say 4 horses are very well possible, if you put some decent amount of effort in one of those.

And while two strokes do not have the amount of torque a four stroke engine has, it still can make use (and tons of fun) with what little it does have
(especially fast turners are one **** of a fun ride!)
do not forget that they do combust twice as often as a four stroke,
thus can really fling around like a rubber band if geared correctly

In fact I'd pick a 50cc two stroke over a 80cc predator (or any other four stroke for that matter) at any time!

I never had more fun on two wheels than with a 125cc two stroke Honda (NSR Hornet)
and that includes my current 750cc four stroke

Anyways.. if you want fun in a small package.. find a 50cc blata pocket bike engine!
(in fact don't! it's expensive and with about 16 horses it doesn't last long either )

'sid

 

[tgus3]

thanks but would this engine work with 35 chain and sprocket? i really dont want to get a whole new outfit

 

[NewbCarter]

If im reading right , it says chain size 25H right in the ad .

So , no , unless there is way to change the sprocket ?

 

[65ShelbyClone]

yeah ill prob just get the lil predator but I wanted to get a smaller one because I don't think even that the 79cc predator with the gas tank will fit..oh well

Perhaps something like a 3hp flathead would work. You can't exactly run to the store and get one anymore, but flatheads do tend to be more compact than OHVs, especially Briggs engines with the side-mount tank.