33cc 2 stroke - Pocket Bike Forum - Mini Bikes
 
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post #1 of 10 (permalink) Old 06-30-2019 Thread Starter
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33cc 2 stroke

I've owned one 47cc pocket bike before, fixed it up and sold it, so I'm still sort of a newb, I received this smaller 33cc pocket bike from a friend, that didn't have an exhaust as well as a fouled carb, I cleaned the carb and gas tank, my question is this, does there have to be an exhaust on it for it to run at all? I've read that two strokes have a different type of exhaust that sends a small amount of blowback for vacuum. So do I need the exhaust before it will start?
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post #2 of 10 (permalink) Old 06-30-2019
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if its a china tool engine bike then it will run without can you post up a pic of it ?

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post #3 of 10 (permalink) Old 06-30-2019
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Re: 33cc 2 stroke

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Originally Posted by jsackutk View Post
I've owned one 47cc pocket bike before, fixed it up and sold it, so I'm still sort of a newb, I received this smaller 33cc pocket bike from a friend, that didn't have an exhaust as well as a fouled carb, I cleaned the carb and gas tank, my question is this, does there have to be an exhaust on it for it to run at all? I've read that two strokes have a different type of exhaust that sends a small amount of blowback for vacuum. So do I need the exhaust before it will start?
A box muffler can be used no problem aswell as a descent length straight pipe ...

https://www.ebay.com/itm/NEW-MUFFLER...ss!11779!US!-1

On a bone stock engine and no way to properly enrichen the fuel to air ratio without a jetkit unless its a pumper carb with a way to adjust the LSN/HSN aswell as fuel rate will result in you running dangerously lean without either ...

Good luck....

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Last edited by CAM2; 07-01-2019 at 09:53 AM.
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post #4 of 10 (permalink) Old 07-08-2019 Thread Starter
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So I ordered the muffler and it's not the right size as you can see I'm holding the gasket to the exhaust port. Maybe I just get my refund and possibly make a project out of it and try to squeeze a bigger motor on it🤔
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post #5 of 10 (permalink) Old 07-08-2019
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half the time ebay sellers have no idea what they are selling get that refund and try again

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post #6 of 10 (permalink) Old 07-09-2019
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Re: 33cc 2 stroke

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half the time ebay sellers have no idea what they are selling get that refund and try again

Nah , although you are correct.....Im pretty sure I dropped the ball on this one....

I was using the box muffler as an example when I posted the link but I had to go back again and re-edit-in the part where I put you need a muffler like this but for 33cc it must of glitched like it almost always does and cancels out my second edit as I was cruising in the 2017 V10 worktruck cruising on the interstate at the time...

Upon taking a closer look at the engine he has I see the coil is very very rusty and the flywheel is very very oxidized aswell as the magnets most likely very very rusty too...

All of that rust and oxidation is going to be needed to be removed from the coil thong ends aswell as the magnets....If not you wont get the engine to run as rust acts like a killswitch and hinders the magnetic attraction to energize the pickup coil...

Theres a good strong chance that 33cc engine is gonna need a new coil and judging by all the rust;- crankseals possibly too.....

He can easily put a 49cc piston ported engine in its place

https://www.ebay.com/itm/Yae-49cc-En...IAAOSwx2hdHF8s

Had the OP posted pics of what he was working with I would of just told him to even see if that thing ran first before buying the muffler and definitely suggested the 49cc engine given the fact that everybody wants more power.....

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Last edited by CAM2; 07-09-2019 at 09:29 AM.
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post #7 of 10 (permalink) Old 07-13-2019 Thread Starter
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Yeah, it was my fault, I didn't get a picture up right away, still trying to figure this forum stuff out, but I do appreciate the responses, and do like the idea of the 49 cc motor, thanks again fellas
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post #8 of 10 (permalink) Old 07-13-2019
Re: 33cc 2 stroke

Yeah I have done the same thing. After 10 or 15 pages no one wants to go back, so, when you post again be sure to say its a 33cc piston port engine which is smaller than the 43 or 49cc engine, no usable parts for the 43 to 49 engine.
That's a great buy $88, get it if you can, but it has no electric start, those engines are around $130.

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post #9 of 10 (permalink) Old 07-18-2019 Thread Starter
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He can easily put a 49cc piston ported engine in its place

https://www.ebay.com/itm/Yae-49cc-En...IAAOSwx2hdHF8s

I'm reading the description of this and it's saying the output sprocket rotates clockwise when facing the clutch side, does that mean gonna have to remove the transmission?
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Re: 33cc 2 stroke

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Originally Posted by jsackutk View Post
He can easily put a 49cc piston ported engine in its place

https://www.ebay.com/itm/Yae-49cc-En...IAAOSwx2hdHF8s

I'm reading the description of this and it's saying the output sprocket rotates clockwise when facing the clutch side, does that mean gonna have to remove the transmission?

Yes if your engine is mounted like this piston ported cag ..........




Alls you have to do is install your clutchbell and youll be golden...You can sell the transmission for $20-25 bux on craigslist and recoup back even more cash to lower costs...

Those engines can be mounted both ways,,,,,,,



The transmission reverses rotation so it can be mounted in a multitude of different vehicles with a multitude of different transmissions for both left and righthand side chain drives..........



If you spin the clutchbell forwards the output sprocket will spin backwards and vice-versa

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Last edited by CAM2; 07-18-2019 at 07:35 PM.
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