Author Topic: side valve owners  (Read 1928 times)

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Online Owen

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Re: side valve owners
« Reply #15 on: March 25, 2018, 09:56:05 am »
I agree with Dave.  My 53 C does not like it if I tried to rev her going up hill. She would get hot and slow just like yours.  She prefers slow and steady.  Give here a chance to bed in and then she will get better.
1940 C12 (350cc)
1945 C10 & C11
1953 C10 & C11
Anyone want a B20 in need of a lot of tlc

Offline bangers-c10

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Re: side valve owners
« Reply #16 on: March 25, 2018, 10:46:14 am »
ok guys thanks for the input, if i get around to it i will pop the barrel off to have a look, but after hearing some take a hell of a lot of running in, i will take that into consideration too,   i will try the bigger jet tho as thats a easy one too try.  the old girl does putt along great if not up it,  it just worried me how it got slower and slower the hotter it got, just most 4strokes ive had no mater how hot they got they still revved  the same and pulled the same as cold. but  they wernt side valves  :)

Online Owen

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Re: side valve owners
« Reply #17 on: March 25, 2018, 11:51:01 am »
Mine are like women. Do what they want when they want and don't like hills.
1940 C12 (350cc)
1945 C10 & C11
1953 C10 & C11
Anyone want a B20 in need of a lot of tlc

Offline bangers-c10

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Re: side valve owners
« Reply #18 on: March 25, 2018, 01:43:35 pm »
And dont ride it to hard and wear the piston out.

Online Cosmikdebriis

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Re: side valve owners
« Reply #19 on: March 25, 2018, 02:17:13 pm »
And make sure you use plenty of lubricant to reduce friction ;)

We could go on forever here...

(Which of course leads nicely on to the next double entendre). :-X
A bike on the road... Is worth two in the shed...

Offline ianinglis

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Re: side valve owners
« Reply #20 on: March 25, 2018, 11:05:27 pm »
check the advance and retard unit!!!!


ian
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Online chaterlea25

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Re: side valve owners
« Reply #21 on: March 25, 2018, 11:16:41 pm »
Hi,
Quote
I did mention once before it got so hot it started to bind up and nearly stop. was way to hot, i just dont push it as hard anymore,
I would think that the piston has been damaged  :(

Quote
check the advance and retard unit!!!!
+1

Have you tried raising the carb needle 1 or 2 notches?
Needle position covers 1/4 to 3/4 throttle range

John

Offline bangers-c10

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Re: side valve owners
« Reply #22 on: March 26, 2018, 02:48:15 am »
Yep i will check the ad/retard unit, it was ok on rebuild,but it may need new springs,as they are 79 years old  :o 
I have tried needle in a few spots,  it is a new needle  the notches were like a hair different then stock, were i have it now seem to make it run best,be nice to have another c10 side by side to compare to, but sadly i dont know anyone that has one.   

I will try bigger jet first guys, do u think it will foul the plug up if to rich.     i will carry spare plug just incase anyway. might not be able to get jet for a few days tho. 

Offline stev60

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Re: side valve owners
« Reply #23 on: March 26, 2018, 07:36:13 am »
Bangers,
im far from an expert but, let it run in, dont kill it. Im using a 90 main on my C10, and the needle on the richer  slot as to leaner , a spacer on the carb (concentric)
runs better  with moisture in the air, your hot weather may be a factor, and maybe try  a lower octane fuel.
Steve

Offline timsdad

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Re: side valve owners
« Reply #24 on: March 26, 2018, 07:48:04 am »
I very much doubt anything you change on the jetting will foul a plug, Mr b, - in my experience this will only be caused by too much fuel on the piston when trying to start the thing. They will always get rid of just about anything that's thrown at them once the motor is running, especially in the higher rev ranges where the main jet is doing its job.

I'd shove a 120 in, get it nice and warm on a road test, then find a nice straight bit of road and a slight up-hill drag works best for me. When she's humming along doing her best in top gear, struggling a bit, just roll the throttle back slightly and, if the main jet is a bit big, the bike will seem to pick up a touch as the needle starts to shut off the main jet and reduce its area.

If it does, then repeat with a 110 in, etc, etc.


Ray
Just a motorcyclist.

Offline bangers-c10

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Re: side valve owners
« Reply #25 on: March 26, 2018, 09:42:23 am »
Thanks guys, think its going to be a busy week, so see how i go with time to try things,

Online Cosmikdebriis

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Re: side valve owners
« Reply #26 on: March 26, 2018, 02:37:41 pm »
That's two votes now for checking the piston for damage. It's a relatively easy job on a sidevalve and shouldn't take half an hour.

One thing is for certain. If it is damaged then no matter what you do with the jetting, it will continue to overheat/seize up.

If your piston looks anything like this then you're in trouble.
A bike on the road... Is worth two in the shed...

Offline bangers-c10

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Re: side valve owners
« Reply #27 on: March 27, 2018, 08:42:42 am »
thanks i understand... i should of wrote this....so see how i go with time to try things,and check things,,

Online Tman

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Re: side valve owners
« Reply #28 on: March 27, 2018, 12:47:07 pm »
A one-ring piston? Not from one of those racing Lambrettas is it? ;)

Offline bangers-c10

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Re: side valve owners
« Reply #29 on: February 22, 2019, 02:03:46 pm »
Over due update,    :o    poor old girl hasnt been rode much, havent checked to much ,but have given the exhaust better flow, and stuck a 120 main jet in it, starts good still, no flat spot when snap throttle,,,,havent taken for ride as yet,,     have been riding it now and then tho just putting around with the 100 main jet..................................... 120  jet only turnt up yesterday.