1972 Jawa 250 Californian - Rust Machine
- Thread starter damiansd
- Start date
jetmechmarty
Been Around the Block
Regarding that copper washer, did you use a new washer? If it was an old one, did you anneal it before you torqued the plug? A work hardened copper washer will not seal. You may know this already, but I thought it worth asking.
jetmechmarty
Been Around the Block
damiansd said:
Yes. Just get it glowing red hot and you'll be good to go. In the case of copper, you may let it cool slowly or quench it in cold water. For our purpose, it should be sufficiently softened either way.
damiansd
Been Around the Block
Fuel filter fixed the lack of restarting.
Four more gremlins:
-oil leak at back of engine. This is a Jawa flaw. There is a pipe that runs from rear of engine to swingarm to keep the swingarm lubricated. In my case it iust keeps my garage floor lubricated.
-petcock leak. A bit more work required with the teflon tape.
-oil leak around header pipes. Just cranked down the exhaust port bolts and am crossing fingers.
And the most significant
-clutch pulls in letting the engine spin but the only gear it lets me find is 2nd.
Four more gremlins:
-oil leak at back of engine. This is a Jawa flaw. There is a pipe that runs from rear of engine to swingarm to keep the swingarm lubricated. In my case it iust keeps my garage floor lubricated.
-petcock leak. A bit more work required with the teflon tape.
-oil leak around header pipes. Just cranked down the exhaust port bolts and am crossing fingers.
And the most significant
-clutch pulls in letting the engine spin but the only gear it lets me find is 2nd.
Hi,
you've done really good work. Thumbs up
I also have some Jawa bikes, Jawa is still very popular in Czech Rep. Now I'm going to build theJawa "Californian" almost from nothing
Here you can see some photos of my bikes
http://longr.rajce.idnes.cz/Jawa_50_555/
http://longr.rajce.idnes.cz/Stadion_S_11/
http://longr.rajce.idnes.cz/Jawa_350_354_kyvacka/
http://longr.rajce.idnes.cz/Jawa_500_OHC_Kyvacka/
Maybe I can give you a hint about the ignition. I was not sure from the photos, maybe you did it.
You have a two-outlet coil. Could be used for two cylinder bike. But when you're using it for one cylinder, you have to ground the second outlet. Use the high voltage wire and mount the end under some screw on the frame. If you won't do it, the coil will "die" after some time.
And my best experience with the ignition timing. I realised that the best timing of spark for classic petrol (European octane number 95) is 3,6 mm before the top position of the piston.
Good luck with continuing
you've done really good work. Thumbs up
I also have some Jawa bikes, Jawa is still very popular in Czech Rep. Now I'm going to build theJawa "Californian" almost from nothing Here you can see some photos of my bikes
http://longr.rajce.idnes.cz/Jawa_50_555/
http://longr.rajce.idnes.cz/Stadion_S_11/
http://longr.rajce.idnes.cz/Jawa_350_354_kyvacka/
http://longr.rajce.idnes.cz/Jawa_500_OHC_Kyvacka/
Maybe I can give you a hint about the ignition. I was not sure from the photos, maybe you did it.
You have a two-outlet coil. Could be used for two cylinder bike. But when you're using it for one cylinder, you have to ground the second outlet. Use the high voltage wire and mount the end under some screw on the frame. If you won't do it, the coil will "die" after some time.
And my best experience with the ignition timing. I realised that the best timing of spark for classic petrol (European octane number 95) is 3,6 mm before the top position of the piston.
Good luck with continuing
damiansd
Been Around the Block
Thanks Ondrej,
They are some beautiful bikes.
I have the second connection on the coil connected to ground on the battery. So that should be cool.
I've made a beginner mistake. The forks are back to front. When I went to put the fender on, the cable guide was on the wrong side. Hoping to rectify that this weekend.
Cheers,
D.
They are some beautiful bikes.
I have the second connection on the coil connected to ground on the battery. So that should be cool.
I've made a beginner mistake. The forks are back to front. When I went to put the fender on, the cable guide was on the wrong side. Hoping to rectify that this weekend.
Cheers,
D.
