The Zongshen TT 250 is Coming

[SpudRider]

Originally Posted by 1cylinderwonder

So the wheels can be ordered from the AKT Factory in Columbia? Do you know what the cost would be? How about shipping charges to the USA?
They are 17" wheels? Will they mount directly to the CSC TT250 bike, or must the calipers be realigned? Any other problems, parts needed, or mounting problems?
Thanks for the answers.

I'm not sure. I suggest you send a personal message to CSCDude. Perhaps he can answer your questions. If the AKT supermoto wheels are compatible with the CSC TT250 forks, there is a possibility that CSC might import the wheels from Colombia. However, I am only speculating on this matter, and don't know for sure. I'm sure CSCDude, can provide you with better answers than I.

[1cylinderwonder]

Originally Posted by SpudRider

It does appear the AKT bike lacks the engine counter balancer.

I would rather have the engine with the counter balancer. I'm sure it must make a difference especially at higher rpms. CSC and or Zong must have requested the higher line engine for export to the USA?
So maybe the CSC and the AKT engines are built/selected to fit the economy (buying power) of the corresponding country. Higher income countries receive more advanced and more expensive products. Like the fuel injection/carb differences in the RX-3s in USA and Columbia.

[SpudRider]

I believe AKT chose a carburetor for their TT Adventour 250 (RX3) because of poor fuel quality in Colombia. However, choosing a carburetor also reduces cost in countries where emissions standards are not as stringent.

The CSC TT250 is manufactured by Zongshen, and has a Zongshen engine. Some, perhaps all, of the Hawk bikes have engines from other manufacturers, and none of the Hawk bikes are manufactured by Zongshen. Apparently the Hawk version sold by AKT in Columbia is either not manufactured by Zongshen, or AKt selected a Zongshen engine without the counter balancer.

[Weldangrind]

It might be a maintenance decision. A counter-balancer takes an anvil-simple design and adds complexity, and eventually repairs.

[SeerAtlas]

Weld, wouldn't the extra mass spinning round act a lot like a larger flywheel? I can see it working for the high rpm road guys, but for near trials like trail work over rough country, seems likely the reg motor would give a bit snappier torque performance when u need it. imho. 6assuming the specs given are accurrate, big assumption, the zong motor looks tuned for higher rpm hp w lower bottom end torque, while the hawk motor looks setup for bottom end torque and less high end hp. i can tell u from riding the hawk, for a 250, its a stump puller down low. i think the some storms have that balanced zong motor. I'd be interested in hearing what they think.

[SpudRider]

Originally Posted by SeerAtlas

...assuming the specs given are accurrate, big assumption, the zong motor looks tuned for higher rpm hp w lower bottom end torque, while the hawk motor looks setup for bottom end torque and less high end hp. i can tell u from riding the hawk, for a 250, its a stump puller down low. i think the some storms have that balanced zong motor. I'd be interested in hearing what they think.

I'd be very surprised if the internal gearing is different. CSC merely went with a 17T C/S sprocket to make the bike more pavement friendly. Most CB owners do the same shortly after acquiring these bikes.

[1cylinderwonder]

Why would the counter-balancer on the Zong engine be maintenance intensive?
Is it gear driven (steel teeth engaging steel teeth) or chain driven (sprockets and chain)? If it's gear driven what is the additional maintenance required? If chain driven, is there a tensioner that needs periodic adjustments or replacement? And what is the frequency of such adjustments?
Just curious.
I would still go for the inclusion of a counter-balancer in the engine of my bike.
Vibration free smoothness is nice, especially on long distance journeys.

[jct842]

It all boils down to what are you going to do with the bike. Not very many things work perfect for all applications. I would probably go for a ba!ancer engine for sustained highway use and non balancer for trail riding.

[Weldangrind]

Originally Posted by SeerAtlas

Weld, wouldn't the extra mass spinning round act a lot like a larger flywheel?

I hadn't considered that. Off the top of my bald head, I'd figure that the counter balancer would spin in the opposite direction of the crank (hence the name). Perhaps that would negate the extra mass. Dunno.

[Weldangrind]

Originally Posted by 1cylinderwonder

Why would the counter-balancer on the Zong engine be maintenance intensive?.

Never said that. I only said it would add maintenance.

Originally Posted by 1cylinderwonder

Is it gear driven (steel teeth engaging steel teeth) or chain driven (sprockets and chain)? If it's gear driven what is the additional maintenance required? If chain driven, is there a tensioner that needs periodic adjustments or replacement? And what is the frequency of such adjustments?

I have no first-hand knowledge of the setup. I'm going off of what one of our members told me, and he's looking for a replacement drive chain for his counter-balancer. I only presume that the tensioner is spring loaded, perhaps like the old XL250S motors.

[kohburn]

additional inertial mass such as a heavy flywheel will improve torque but slow the responsiveness. it might be a little less rev happy, you'd have a more noticeable effect from lighter rims and tires. than from dropping the balance shaft.

[Mudflap]

The Lifan and other CG clones with a balance shaft are gear driven. In order to do that the manufacturer had to move the oil pump down out of the way and drive it with a small chain. After over 50,000 miles that chain is worn on my Lifan 200 and I have been unable to find a replacement. Probably not many people put that many miles on a small bike so I would't let that influence my purchase decision.

BTW my Zongshen CG200 non balance shaft engine is nearly as smooth as the balance shaft Lifan CG200. The reason could be the Zong engine's bigger bore and shorter stroke.

[Weldangrind]

Thanks for chiming in, Mudflap. I couldn't recall who had the chain issue. Thanks also for setting me straight that it's the oil pump drive chain.

[kohburn]

Originally Posted by Mudflap

The Lifan and other CG clones with a balance shaft are gear driven. In order to do that the manufacturer had to move the oil pump down out of the way and drive it with a small chain. After over 50,000 miles that chain is worn on my Lifan 200 and I have been unable to find a replacement. Probably not many people put that many miles on a small bike so I would't let that influence my purchase decision.

BTW my Zongshen CG200 non balance shaft engine is nearly as smooth as the balance shaft Lifan CG200. The reason could be the Zong engine's bigger bore and shorter stroke.

can you get a set of calipers on the chain to take all the critical measurements? (length of link, height of link, length pin to pin, outside width of link, inside width of link or roller width, roller diameter) for cost reasons it really shouldn't be a non-standard link size so should be able to at least get a section of chain the correct number of links and make a custom chain.

[rojo_grande]

Just saw an update on the CSC blog on the TT. Says production slated for early March. Not looking good to pick the bike up in mid March after the RX3 Baja ride.

http://californiascooterco.com/blog/?p=19601

Also looks like the Columbia headlight cage will be made available soon for the RX3.

Rojo