Hey Guys,
I have been building a cafe racer from an old xs250 1979 i picked up.
I have re built the top end, put pods on etc. really put in a lot of blood sweat and tears.
I am almost done and nearly able to ride this bike. But i am really really stuck on the carburators.
Currently the bike starts great, runs for a bit and sounds great. 2 things then happen once i turn the bike off choke and let it run on its own. It revs at about 1500 rpm, then after a short while it will rev up on its own to 5000rpm. This is just what its doing currently. Before hand it was not able to run without the choke on. Also note the spark plugs are full of black soot. So its obviously too rich.
So I know the running of the bike is due to the carb setting not being correct. And i really need some help of what setting i should have for the carbies.
Current Carb Details:
-Running pods
-Bigger main jet. 122.5 (due to having pods)
-mixture screws about 1 1/2 turns out. (tried all differant turns didnt seem to fix it)
- float levels 29mm.
-pilot jet (standard)
-butterfly flaps set slightly open.
-c clip on second last notch on the pin.
-Static timing has been done.
-Tapets done etc
If anyone can help me with this guys i really would apreciate it. For the passed few weeks all i have been doing is playing with the carbs trying all differant things. but nothing seems to fix it and make the bike run and idel smooth. If anyone needs for info. let me know.
Thanks so much.
I have been building a cafe racer from an old xs250 1979 i picked up.
I have re built the top end, put pods on etc. really put in a lot of blood sweat and tears.
I am almost done and nearly able to ride this bike. But i am really really stuck on the carburators.
Currently the bike starts great, runs for a bit and sounds great. 2 things then happen once i turn the bike off choke and let it run on its own. It revs at about 1500 rpm, then after a short while it will rev up on its own to 5000rpm. This is just what its doing currently. Before hand it was not able to run without the choke on. Also note the spark plugs are full of black soot. So its obviously too rich.
So I know the running of the bike is due to the carb setting not being correct. And i really need some help of what setting i should have for the carbies.
Current Carb Details:
-Running pods
-Bigger main jet. 122.5 (due to having pods)
-mixture screws about 1 1/2 turns out. (tried all differant turns didnt seem to fix it)
- float levels 29mm.
-pilot jet (standard)
-butterfly flaps set slightly open.
-c clip on second last notch on the pin.
-Static timing has been done.
-Tapets done etc
If anyone can help me with this guys i really would apreciate it. For the passed few weeks all i have been doing is playing with the carbs trying all differant things. but nothing seems to fix it and make the bike run and idel smooth. If anyone needs for info. let me know.
Thanks so much.