The CH-250 "Churchill"

[Serpentza]

Beer Girl starts the CH-250 "Churchill"

What is the Churchill? Good question! It's my built in 10 days project bike, which went from a pile of scrap ZJ125 knockoff (which is a CG125 knockoff) to an awesome little powerhouse 6 speed bulldog of a bike.


If you're interested in the build, here's the thread: http://www.mychinamoto.com/forums/sh...cles-Challenge

The reason for this thread is for me to show you what the end product looks like, how it performs and any trials or tribulations I hit during the run-in phase.

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Here are the current specifications:
Top speed: 117.6km/h at present (wil change gearing to get a little more)
Range: Approximately 235km / tank (which is a standard CG125 8L tank)
Frame and swingarm: generic CG125 (Swingarm has been modified slightly to accomodate the large rear tyre)
Front forks, triple clamp(modified stem), brake master cylinder and caliper: Off of a Qingqi GS125 (which is a Suzuki GS125 knockoff)
Front brake disk and wheel: Brand new generic GN125 ventilated disc and brand new generic GN125 alloy wheel
Rear shocks: Dual coil over shocks adjustable (off of some or other police bike, pretty standard Chinese shocks, but very rigid)
Rear wheel: Qingqi GS125 alloy
Rear tyre: Kenda Mirage 110/90 - 18
Front tyre: Buggered if I know, I'll check the bike later and edit it in***
Engine: 6speed 250cc GTY CB250 type single cylinder 4-stroke (Came in a Zhongshen box) very nice growly little thing with a lot of pull.
Carb: Mikuni branded PZ-30 (at least it looks more posh than the usual ones :) )

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I named it "The Churchill" after the first time I took it for a ride, it had a huge amount of grunt and power all packed into a staunch little package, it reminded me of a Bulldog, and well Winston Churchill came to mind.. I thought it appropriate :D

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It has a very low idle noise due to the long muffler, but when you open the throttle it makes a most delightfully satisfying deep growl.


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I took the CH-250 on a short road trip (a total of about 400kms) last week to Huizhou and back (also did quite a bit of riding around Huizhou.. visited that odd copy of an Austrian town etc, all coming up in the RR).

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She was very comfortable almost idling at 80km/h in 6th gear, 90km/h was an ideal cruising speed and even though I though the riding position would be uncomfortable, I was surprised after 3 and a half hours of riding I still felt absolutely fine.

So far the only drawback to the bike is the short rear mudguard which although it looks cool, leads to a wonderful brown racing stripe up your back should you encounter a wet road or puddle... I'm going to work on some sort of pull out temporary guard system that can be hidden away when not in use...

More pictures and videos to come in the future.

- Winston (SerpentZA)

[ZMC888]

Are you sure about changing the sprocket? I'd prefer not to lose the acceleration than gain a few km/h top end. Anyhow 12-14KW 250s seem to run out of grunt at about 120 km/h.

[Zorge]

What is the Churchill?

At first, I thought that I understood your logic, why have you named your project Churchill - because it looks like a Churchill teapot.



But it seems I was wrong.

Jokes aside. I thought I'd keep the old tin fender. He looked quite "organic" on your bike.

[moilami]

This is the most honourable and awesome 10+ project. You are the man and not a diaper boy.

[modron]

what a beauty!!!! i wish i could learn how to do that, as i have plenty of free time!

amazing

[lipsee]

Hi Tell us about the engine and the fitting of the engine,,was it easy and where did you get it,,,any photos of the fitting,,,Why do I ask? Cos I coming to CN in March(Guangzhou) and feel like doing the same as you,,,,I have 3 weeks and really have nothing to do except wait for my Charm to come home from work...if I buy a 2nd hand bike with papers is it fairly easy to follow in your tracks,,tips and hints please....cheers Phil

[Serpentza]

Hi Tell us about the engine and the fitting of the engine,,was it easy and where did you get it,,,any photos of the fitting,,,Why do I ask? Cos I coming to CN in March(Guangzhou) and feel like doing the same as you,,,,I have 3 weeks and really have nothing to do except wait for my Charm to come home from work...if I buy a 2nd hand bike with papers is it fairly easy to follow in your tracks,,tips and hints please....cheers Phil

Fitting the engine was easy, I just sat on the floor, lifted it into place (it was heavy to had to sit cross legged and lean the engine on my knee), slide in the engine mount bolts and there we go, done :) All the build videos are up on youtube if you want to take a look: www.youtube.com/serpentza (I'll upload youku versions and put them into the "crap bike chronicles" thread soon).

[humanbeing]

where did you get it...l

Taobao.com. Many seller located in Chongqing. Made by Jialing / Loncin / Zongshen are recommened. Most engine are the "industry" version (w/o brand , engine#, etc), Some sort of guarantee doc from factory ONLY. Most seller can stamp the specified (as the old) engine# for small sum of $.
This is most expensive of that family JL: http://item.taobao.com/item.htm?id=15689703994

Eating oil was the common ??? in most (65.5) chinese 223. From taiwanese site:http://translate.google.com/translat...73346-1-1.html

[modron]

no problems with getting plates?

[euphonius]

no problems with getting plates?

Haha. There's a wise guy in every crowd!

Actually, would be great to hear that you'd managed by some miracle to get it legalized.....

Brilliant thread, awesome project. Inspiring.

cheers