Hongdou 250 rides again

czowner · 04-21-2007, 03:58 AM

To refresh peoples memory as it's been a while, my 250 has a crush drive in the clutch, from my homework the 250 is the only Chinese bike/ATV to have a crush drive there. Sometime after the first oil change at 600km the rubber inserts disintergrated. After numerous phone calls and e-mails I come to the conclusion that 250 engine spares don't exist. I found plenty of clucthes form other models that could easily be adapted to fit, but they all have different numbers of teeth on the gear (68-74). After looking unsucessfully for something rubbery to make new inserts out of I had a flash of inspiration, nylon bar, $7 for half a metre of 30mm dia. An hours work with a lathe and a Dremmel and I have 4 new solid inserts. The motor has gone back together using Honda CRF 230 gaskets (the clutch casing is different) so a CRF clutch might fit, but the CRF is not a UK model so any spares would have to be imported. While it was apart I raised the carb needle a notch as the plug was a little white, the needle was already up one notch as stock so it's now on it's highest setting. Since putting it back together 10 days ago I've done 1000km, a screw has shaken out of the number plate and that's the only negative thing to report! The oil consumption has stopped, instant cold starting and fuel consumption has slightly improved to around 95mpg (imperial), 80mpg(US). I'm back to being a happy bunny again.

Jonathan.

ob1 · 04-21-2007, 08:00 AM

Excellent fix!

Hopefully you wont be finding bits of nylon at the next oil change!

fatboy250 · 04-21-2007, 08:56 AM

Great to hear you're up and running again.

liverchip · 04-21-2007, 11:48 PM

Nice work!

frostbite · 04-22-2007, 08:50 AM

04-21-2007, 03:58 AM	#1
czowner Join Date: Sep 2006 Location: North East England Posts: 313	Hongdou 250 rides again To refresh peoples memory as it's been a while, my 250 has a crush drive in the clutch, from my homework the 250 is the only Chinese bike/ATV to have a crush drive there. Sometime after the first oil change at 600km the rubber inserts disintergrated. After numerous phone calls and e-mails I come to the conclusion that 250 engine spares don't exist. I found plenty of clucthes form other models that could easily be adapted to fit, but they all have different numbers of teeth on the gear (68-74). After looking unsucessfully for something rubbery to make new inserts out of I had a flash of inspiration, nylon bar, $7 for half a metre of 30mm dia. An hours work with a lathe and a Dremmel and I have 4 new solid inserts. The motor has gone back together using Honda CRF 230 gaskets (the clutch casing is different) so a CRF clutch might fit, but the CRF is not a UK model so any spares would have to be imported. While it was apart I raised the carb needle a notch as the plug was a little white, the needle was already up one notch as stock so it's now on it's highest setting. Since putting it back together 10 days ago I've done 1000km, a screw has shaken out of the number plate and that's the only negative thing to report! The oil consumption has stopped, instant cold starting and fuel consumption has slightly improved to around 95mpg (imperial), 80mpg(US). I'm back to being a happy bunny again. Jonathan.
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04-21-2007, 08:56 AM	#3
fatboy250 Join Date: Sep 2006 Location: COLUMBIA, SC Posts: 973	Great to hear you're up and running again. __________________ 2008 Jonway MC-70-150 2007 Roketa DB-07B (RSM-200E) 2006 Roketa DB-07A (RSX-200E) 1995 Kawasaki Concours (ZG1000)
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04-21-2007, 11:48 PM	#4
liverchip Join Date: Nov 2006 Location: Mystery Spot Posts: 1,223	Nice work! __________________ 2009 XR650L Big Red Pig Tusk bar risers 2007 X-Moto(Jetmoto) GY250 --mods--- 15/40 sprockets UNI Pod Filter 2007 Shineray TMS 200XYi--Betsy Betsy Mods:______________________ Acerbis DHH headlight FMF Powercore pipe Uni Pod Filter
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04-22-2007, 08:50 AM	#5
frostbite Join Date: May 2006 Location: Fredericton, NB, Canada Posts: 1,744	__________________ Frostbite "The beatings will continue until moral improves"
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04-21-2007, 08:00 AM	#2
ob1 Join Date: Jul 2006 Posts: 499	Excellent fix! Hopefully you wont be finding bits of nylon at the next oil change!
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