fireing in carbs

bruteboy · May 31st, 2010, 06:44 PM

ok guys i just recently rebuilt the brute for you guys thats just getting in runs but i have been haveing trouble with the engine sounding like it missses then cut s off after a few times. well i found the what the missing is the front cylinder is firing off in the carb i was playing around with valves today and i looked in the front carb and when it idles it fires in the carb you see it fire down in there. it doesnt do right off just after abou 3 or 4 revolutions. thanks guys need some help asap.

Coolwizard · May 31st, 2010, 08:26 PM

I'm not sure I understand exactly what you mean by "firing in the carb" but this sounds like a timming issue.....after the 3-4 revolutions, is it consistent?

bruteboy · May 31st, 2010, 08:41 PM

yeah when it starts it keeps doing it its like it has to load up then it starts at first i thought maybe my valves wernt closing all the way so o took off the carbs and looked in the intake and they close all the way i have no clue what could cause it besides timind but im really sure it right.

bruteboy · May 31st, 2010, 08:42 PM

when i say firing in the carb it like when it combust in the cumbustion chamber you can look down in the carb and see fire.

NMKAWIERIDER · May 31st, 2010, 08:48 PM

Quote:

Originally Posted by bruteboy

yeah when it starts it keeps doing it its like it has to load up then it starts at first i thought maybe my valves wernt closing all the way so o took off the carbs and looked in the intake and they close all the way i have no clue what could cause it besides timind but im really sure it right.

So the valve timing is correct...and you stake your rep on it, then its leaking valves. Either set to tight, or the seats were lapped in wrong...you did do a valve job while apart...right? What are the valves set at?

bruteboy · May 31st, 2010, 09:13 PM

i dont set my rep on it but i am pretty sure i will check again. and no not valve job kept thr same valves figured it would be ok if i left the valves alone?

NMKAWIERIDER · May 31st, 2010, 09:36 PM

Quote:

Originally Posted by bruteboy

i dont set my rep on it but i am pretty sure i will check again. and no not valve job kept thr same valves figured it would be ok if i left the valves alone?

Ok, well, might have one leaking for some reason. The intakes are shut by or very near the bottom of the intake stroke and don't start opening again for ...what..1.5 revolutions...so there shouldn't be ant fire or combustion getting past the valves...unless they...or one is.. are leaking for some reason

bruteboy · May 31st, 2010, 09:51 PM

i agree it desnt make since all i know is that has to cost me power and do you have any idea what it would cost to get a brute tuned up at a shop? and do they check timeimg vavles ect? thanks

NMKAWIERIDER · May 31st, 2010, 10:11 PM

Quote:

Originally Posted by bruteboy

i agree it desnt make since all i know is that has to cost me power and do you have any idea what it would cost to get a brute tuned up at a shop? and do they check timeimg vavles ect? thanks

I have no clue what it would cost at ashop...but...I think its time your went in for a visit. Yes, they check everything. Just tell them what you have seen and felt.

bruteboy · May 31st, 2010, 10:28 PM

ok i will make a call this week and nm mexico rider i apreciate it man thanks