[Mgs] new muffler

[PaulHunt73]

In my experience changing the breathing i.e. air filters and exhaust will 
affect mixture *through the throttle range* i.e. you may well get it spot on 
at idle but with a freer flowing engine find that you get flat spots at a 
wider throttle opening, I had to go for 'richer' needles on my V8 with these 
two things modified (by a PO I hasten to add).  The corollary of that is 
with a more restrictive setup it could get richer through the range, but 
should still be easy to set up correctly for idle.  At idle (and by 
implication starting) changing the restriction of intake and exhaust has 
negligible effect, unless there is a massive vacuum leak in the intake or 
severely choked exhaust.  Hard starting when cold could be over-rich if the 
weather is very warm, or not rich enough if it is cold.  Hard starting from 
hot is usually over rich.  In both cases that's if mixture *is* the problem, 
there can be other reasons of course.  What is your ambient temp currently, 
do you use the choke, and how much?  If it's warm, and you habitually pull 
the choke out fully to start with a 'cold' engine, try pulling it half way. 
After checking/adjusting the mixture with the lifting pins (or whatever) 
first of course.  If you are confident they are balanced, then only adjust 
both carbs by the same amount in the same direction.  If you find the 
lifting pins give different results for the two carbs then they will have to 
be set up from scratch.

PaulH.

----- Original Message ----- 
The carbs are synch'd and run well, but are a bit hard to get started. I do 
get about 25mpg (US). So I believe it's pretty close. But I just think that 
I could get it to start a little easier.