I cleaned the carb off the bike, used aerosol carb cleaner and liberally sprayed it thru all the passages. I admit, I only pullled the pilot jet and verified it passed light thru the orifice. I guess I need to pull the rest of them...
I inspected the floats and needle, they look good but I haven't checked the float level and the float valve needle if it seals. I can see how to check the float level, but how do I check to see if the float valve needle is sealing?
I guess I also need to pull the valve cover and check the valve clearances also. I understand to set the clearance on the loose side because they will get tighter as they wear.
Anything else?
Thanks!
-David
________________________________
From: Jeff Saline
To: david.r.nichols@...
Cc:
DSN_KLR650@yahoogroups.com
Sent: Tuesday, January 31, 2012 9:51 AM
Subject: Re: [DSN_KLR650] Carb advice.
On Tue, 31 Jan 2012 07:41:05 -0800 (PST) David Nichols
writes:
> Well I have checked my rebuild list and re-checked it and my engine
> still won't idle. I can crank it and get it to fire up by giving it
> throttle, but when I let off the throttle it dies. I pulled the new
> spark plug and it was black and wet.
>
> I've cleaned the carb thoroughly, made sure the petcock is working,
> the diaphragm on the slide is good, no leaks in either the exhaust
> or the carb boots...and the enrichiner is working. Here's what I've
> done to the engine so far: I have changed the oil and filer,
> replaced the exhaust gasket, cleaned the carb, new "choke" cable,
> new petcock, new fuel line, new air filter, new NGK DPR8EA-9 spark
> plug, and new Deka AGM battery.
>
> A little history: The bike was last licensed on the road in 2007, I
> bought it in a non running condition. It has just under 13,000 miles
> on it.
>
> The one part I discovered needing replacement is the air cutoff
> valve diaphragm. It has tiny holes in it due to the rubber breaking
> down, I have one on order. But, would that bad part cause the engine
> to run bad at idle? I thought that only had a purpose at higher RPM
> and during deceleration.
>
> And what about valve clearance? I haven't checked that yet...could
> that cause these symptoms?
>
> -David
<><><><><>
<><><><><>
David,
An air leak like from the air cutoff valve diaphragm could cause poor
idle issues.
Tight valves will cause idle issues and hard start issues too. May I
suggest if you adjust the valves you put them to the max spec and not
just "in" spec.
Just out of curiosity how did you clean the carb and also how did you
clean and inspect the jets and carb body orifices where the jets go?
The wet sparkplug suggests too much fuel. Is the float and needle
working correctly?
Best,
Jeff Saline
ABC # 4412 South Dakota Airmarshal
Airheads Beemer Club
www.airheads.org
The Beautiful Black Hills of South Dakota
75 R90/6, 03 KLR650
.
.
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