All's good-fouled plugs

versuspop · Post by **versuspop** » Sat May 01, 2010 3:14 pm

Ok...this is where I am at now.
New (for good measure) main jet from honda dealer. still 120 although I could not get it to tighten flush to the jet housing (the 8mm bolty sleeve thing that the jet screws into)
original (i think) 35 idle jet
clip on needle in middle position

bike will not stay started. runs rough with popping sounds that sound (like my friends 71 triumph tr6r)
this is if i keep throttle open.

then it started revving really high and erratic and then died.

i could get it to idle for about 30 seconds (sill rough) with the idle screw all the way in....

highly frustrating!!!

again -ran great with the originally posted settings...

Spargett · Post by **Spargett** » Sat May 01, 2010 5:10 pm

I would verify the the float level's height down to a fraction of a hair before you do anything else.

versuspop · Post by **versuspop** » Sat May 01, 2010 6:13 pm

i have got the main jet seated correctly. float hight on pw22 carb is 26.5, right?

so all I have changed is the needle height and the idle jet from 40 to 35.

ugh.....

I am amazed at the difference in performance that the change in jet - by one size can cause!

versuspop · Post by **versuspop** » Sat May 01, 2010 6:42 pm

nevermind about the float height...found the answer in Silver's Manual. now searching forum for a definitive answer as to where to measure the float height from...the rim or recess.

teazer · Post by **teazer** » Sun May 02, 2010 10:14 am

the recess

BTW, a change of slow (pilot) jet from 40 to 35 should not cause that effect if everything else was OK. The popping and banging and runaway idle sound more like an air leak or something.

I'd go back to basics.

Check the points and ignition timing
check valve clearances
Check the compression with the throttle wound fully open
Clean out the fuel tap (petcock)
Check the carb flange to see how bowed it is.
Check the O ring in the carb flange

And then try it again.

versuspop · Post by **versuspop** » Sun May 02, 2010 1:23 pm

sounds good...thanks. i will post the results soon.

versuspop · Post by **versuspop** » Mon Jun 21, 2010 9:21 am

Had a combo of a faulty jet and a slight air leak.

The jet was marked wrong or something. When held up against a new jet (from HONDA) the inside diameter was almost double the new one. This, eventhough they were marked as the same.

versuspop wrote:sounds good...thanks. i will post the results soon.

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All's good-fouled plugs