1991 CBR starting problem

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daught · #1 Unread post by **daught** » Sun Sep 25, 2005 4:25 am

Well I got myself a 1991 Honda CBR 600cc. Well the bike has not been started in 4 years untill yesterday. Me and my dad were on it for 2 days to get it runing and we finally did. When we got it runing it worked damn well. No problems. So I had my fun riding it around and put it back in the garage. Next morning it did not start again. To get it started I had to put a few drops of gas into those air intake holes on the carb (btw how are they called in english?). Then it started right off. Restarting is no problem. If I leave it more then one hour then again it wont start and again I have to put gas in the carb then it runs fine. So any ideeas why it wont start after siting one hour?

Gadjet · #2 Unread post by **Gadjet** » Sun Sep 25, 2005 5:43 am

Are you using the choke when you start the bike?

If you aren't, then you will have a hard time starting the bike when it's cold. The choke dumps more fuel into the cylinders making it easier to start and get warmed up; you close the choke when the bike has gotten warmed up.

part 3 is the choke cable and part 4 is the choke lever.

daught · #3 Unread post by **daught** » Sun Sep 25, 2005 6:17 am

Yes I am using full choke and I saw it working. I think there just isnt any gas to fire up. When I try to restart it rumbles for a second then dies. I think since my gas pump uses vacuum it dosent get enough vacuum when trying to start it I dont get any gas in the carb. When I shoot gas in the carb with the siringe it has enough gas to start and make vacuum to continue runing. Could that be it?

Gadjet · #4 Unread post by **Gadjet** » Sun Sep 25, 2005 9:40 am

you may have a vacuum leak on the petcock vacuum line then. Replace that hose and see what happens. If that doesn't help the problem, you're only out a dollar or so and you have a new line.

sidecarguy · Wed Sep 28, 2005 12:38 pm

it dont have a prime position?
too feed the carb by gravity?