Engine upgrade

Thumper · 05-17-2022, 02:06 PM

Zongshen sells the 300cc (279cc) 4valve liquid jacketed engine on Alibaba for$700. They say it is used on the Zuumav dirt bikes (They make the Templar X as well).
I'd like to install it in my bike which has the typical Zongshen 229cc clongine, but the mounting is very different. Two mounting points in front and two in back, and none on the cylinder head.

Is the only upgrade path for the 229 a big bore kit?

I mean besides head porting, ignition advance key, intake and exhaust work.

Ursa_Adv · 05-17-2022, 02:49 PM

Always glad to see another person thinking about taking on a swap.

1) Yup. For the hard "upgrades" on the 229cc engine: you have the big bore kit, timing key, cam, porting, etc. If you want more displacement and more horsepower, you can only squeeze so much out with all of the above.

Beyond what it can support, the only real options are a new engine or a new bike. Engine might be cheaper. Could be more expensive in the long run, however.

I say this because you are going to have to modify your engine cradle for mounting, do some re-wiring on the harness, figure out your radiator mounting situation, etc. It doesn't seem like a lot but it can add up quick.

2) Are you going to put this into your Storm?

3) Do you have a link handy? I think I know which one it is, but a link is always good to have.

Thumper · 05-17-2022, 04:01 PM

https://www.alibaba.com/product-deta...505562341.html

olds_cool63 · 05-17-2022, 07:58 PM

Hmmmm....24.8 HP/16.9 foot-lbs...not bad. Not bad at all...

Thumper · 05-18-2022, 04:44 AM

I wonder about ordering one of those 300cc racing MXers direct ? Some are available in quantity of one. Claiming EPA certified even!

Thumper · 05-18-2022, 09:33 PM

Quote:

Originally Posted by Thumper

I wonder about ordering one of those 300cc racing MXers direct ? Some are available in quantity of one. Claiming EPA certified even!

Here is an example

Minimum order is 1 on this. Most are at least 5.

https://www.alibaba.com/product-deta...474496470.html

alex_in_az · 05-19-2022, 01:50 PM

Quote:

Originally Posted by olds_cool63

Hmmmm....24.8 HP/16.9 foot-lbs...not bad. Not bad at all...

that's about what my 1982 honda CB250RS single was making

kevperro · 05-19-2022, 07:10 PM

Quote:

Originally Posted by Thumper

Here is an example

Minimum order is 1 on this. Most are at least 5.

https://www.alibaba.com/product-deta...474496470.html

Nice... we need a nice CFR300/KXL300 Chinese version. The little extra umph and that extra gear along with EFI would easily bring $3000 retail.

05-17-2022, 02:06 PM	#1
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,970	Engine upgrade Zongshen sells the 300cc (279cc) 4valve liquid jacketed engine on Alibaba for$700. They say it is used on the Zuumav dirt bikes (They make the Templar X as well). I'd like to install it in my bike which has the typical Zongshen 229cc clongine, but the mounting is very different. Two mounting points in front and two in back, and none on the cylinder head. Is the only upgrade path for the 229 a big bore kit? I mean besides head porting, ignition advance key, intake and exhaust work.
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05-17-2022, 02:49 PM	#2
Ursa_Adv Join Date: Jan 2021 Location: PNW Posts: 118	Always glad to see another person thinking about taking on a swap. 1) Yup. For the hard "upgrades" on the 229cc engine: you have the big bore kit, timing key, cam, porting, etc. If you want more displacement and more horsepower, you can only squeeze so much out with all of the above. Beyond what it can support, the only real options are a new engine or a new bike. Engine might be cheaper. Could be more expensive in the long run, however. I say this because you are going to have to modify your engine cradle for mounting, do some re-wiring on the harness, figure out your radiator mounting situation, etc. It doesn't seem like a lot but it can add up quick. 2) Are you going to put this into your Storm? 3) Do you have a link handy? I think I know which one it is, but a link is always good to have. __________________ NC250 Swapped '20 Orion RXB250L Build Thread
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05-17-2022, 04:01 PM	#3
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,970	This one... https://www.alibaba.com/product-deta...505562341.html
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05-17-2022, 07:58 PM	#4
olds_cool63 Join Date: Aug 2008 Location: Maricopa, AZ Posts: 159	Hmmmm....24.8 HP/16.9 foot-lbs...not bad. Not bad at all... __________________ Nuff said. olds_cool63 ======= Johnny Pag Pagsta (replaced 50cc engine with 110cc, modded-out) 2007 Tank Vision Topline Khaos (cosmetic mods, cherry-bombs) 2005 Kymco Vitality 50 2T (70cc big bore kit, other race mods...tops out at 67mph) 2008 Hyosung GT250 (cosmetic mods) 2001 Suzuki Bandit GFS1200S (cosmetic and slight mods...150mph+)
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05-18-2022, 04:44 AM	#5
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,970	I wonder about ordering one of those 300cc racing MXers direct ? Some are available in quantity of one. Claiming EPA certified even!
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