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New 200cc alu cylinder
Mole
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Mole
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UPDATE

Done 160 mile so far.
Running on a
NGK B7es spark plug.
122 main
58/160 slow running jet.
Engine running ok
I did up the the pre mix oil a little
next fill up I will go back to 2%.
I will do some more miles before I do a plug chop.

Mo............
Positive
Mole
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Mole
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Update

Not over impressed!!!
300 miles done so been opening it up.
Done three plug chops.......
last one a 122, and is nearly there.
So will go for a 125.

Thought it showed more power ( torque )
and should rev higher on the graph.

Can not fill any more torque
It revs up to 57 mph

My standard 200 cylinder with a 116 jet.
pulls thorough the the hole range 60 mph and above.

Conclusion....If no improvement with a 125 jet..
I will put the standard cylinder back on !!!

Mo..........
Positive
Mole
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Mole
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Hi All,
I just like to say I am not a mechanic .
I have changed the main jet up to a 135.
and cannot get it to run rich.
I am at the point of giving up.
and change back to the cast iron cylinder.


Mo.....
Jack221
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PX221 MHR heavily tuned, PX200 O tuned, PX181 M1XL tuned, PX166 tuned a quite bit and some motorbikes
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Jack221
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PX221 MHR heavily tuned, PX200 O tuned, PX181 M1XL tuned, PX166 tuned a quite bit and some motorbikes
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UTC quote
Mole wrote:
Hi All,
I just like to say I am not a mechanic .
I have changed the main jet up to a 135.
and cannot get it to run rich.
I am at the point of giving up.
and change back to the cast iron cylinder.


Mo.....
What air corrector are you running?
Mole
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Mole
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Was hoping you would reply.

Air correction jet......160/100

Mo......
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MJRally
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73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special
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MJRally
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73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special
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UTC quote
Mole wrote:
Hi All,
I just like to say I am not a mechanic .
I have changed the main jet up to a 135.
and cannot get it to run rich.
I am at the point of giving up.
and change back to the cast iron cylinder.


Mo.....
If you pull the choke, does your motor run fine? Or die from too much fuel?
Mole
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Mole
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At tick over in dies.
@mjrally avatar
MJRally
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73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special
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MJRally
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UTC quote
Mole wrote:
At tick over in dies.
What about while riding? Should run poorly/die if favoring the rich side.
@frank_n_stein avatar
Frank N. Stein
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Frank N. Stein
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sdjohn wrote:
what the hell is a raceway? it's the old SIP version of english again I think.
The cylinder wall, aka bore.

The SIP version of English is not that bad overall. You should try its version of French! (sometimes so nonsensical it's hilarious...)
Positive
Jack221
UTC
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PX221 MHR heavily tuned, PX200 O tuned, PX181 M1XL tuned, PX166 tuned a quite bit and some motorbikes
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Location: London UK
 
Jack221
Jet Eye Master
PX221 MHR heavily tuned, PX200 O tuned, PX181 M1XL tuned, PX166 tuned a quite bit and some motorbikes
Joined: UTC
Posts: 5220
Location: London UK
UTC quote
Mole wrote:
Was hoping you would reply.

Air correction jet......160/100

Mo......
AC120 no bigger. On main or pilot.
@mjrally avatar
MJRally
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73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special
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MJRally
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Felt a little rich but temps were good. I'm 215lbs.
Forum member supplied image with no explanatory text
Mole
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Mole
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Until there is more information out there . Going to shelve it.
and put original back on.
May sell it. (any offers )

Mo........
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