Latest topics
» Rechroming
Today at 6:14 am by kerabo

» Fulmar 88 or 90?
Today at 6:09 am by fulmar88

» Kestrel 69 fork seals take two.
Yesterday at 11:29 am by johnh

» AMC Carb manifold
Yesterday at 10:42 am by piston 197

» Opions sort on FB Cruiser 80 250cc as a rideable bike.
Yesterday at 8:30 am by casperboat

» NEW CLUB MEMBERS
Sun Aug 20, 2017 5:34 pm by casperboat

» AMC gudgeon pin removal
Sun Aug 20, 2017 1:35 pm by piston 197

» Hi from Barnsley, S Yorks, UK
Sun Aug 20, 2017 9:58 am by piston 197

» VILLIERS ENGINE
Sun Aug 20, 2017 9:58 am by MR SINBAD


8E main Jet

View previous topic View next topic Go down

8E main Jet

Post  kerabo on Sun Dec 04, 2016 5:26 pm

Has anyone that has an 8E engine with the S25 carb fitted know what size main jet they have fitted. I am building an engine that has a 120 fitted. This looks a very large hole so just asking as I go.

Thanks Ken
avatar
kerabo

Posts : 2016
Join date : 2008-02-11
Age : 67
Location : Falcon 87. Trials 93 Special. Powerbike 56. Falcon 81 Green Lane bitsa. Sunbeam S8. Honda Deuville.

Back to top Go down

main jet

Post  piston 197 on Sun Dec 04, 2016 6:04 pm

Yes 120 is correct for a Villiers 8E whether fitted with a S24 or S25, if the hole looks bigger, maybe someone has drilled it out ?
JH
avatar
piston 197
Moderator

Posts : 3516
Join date : 2008-08-17
Location : ross-on-wye

Back to top Go down

8E Jet

Post  kerabo on Sun Dec 04, 2016 6:37 pm

Cheers John
I will replace with the same or very close just to be sure
Regards Ken
avatar
kerabo

Posts : 2016
Join date : 2008-02-11
Age : 67
Location : Falcon 87. Trials 93 Special. Powerbike 56. Falcon 81 Green Lane bitsa. Sunbeam S8. Honda Deuville.

Back to top Go down

Re: 8E main Jet

Post  Brentis1 on Sun Dec 04, 2016 11:07 pm

Hi Ken,

I just checked my S25 on an 8E and it definitly has a 120 main jet.

Cheers

Brent

Brentis1

Posts : 42
Join date : 2016-06-11

Back to top Go down

Main Jet

Post  kerabo on Mon Dec 05, 2016 8:52 am

Thanks to all
Will order one.
Regards Ken
avatar
kerabo

Posts : 2016
Join date : 2008-02-11
Age : 67
Location : Falcon 87. Trials 93 Special. Powerbike 56. Falcon 81 Green Lane bitsa. Sunbeam S8. Honda Deuville.

Back to top Go down

Piston 97 new Logo

Post  peter@dunfordconstruction on Mon Dec 05, 2016 9:27 am

Hi John.

Is that a new bike Fulmar trials???

Peter

peter@dunfordconstruction

Posts : 156
Join date : 2014-10-28
Location : Lymington Hampshire

http://peter@dunfordconstruction.co.uk

Back to top Go down

Re: 8E main Jet

Post  Andrewwoey on Thu Dec 08, 2016 8:35 pm

Mine seems very boggy with the 120 in it. I will do some experimenting with the jetting, in the summer.

Andrewwoey

Posts : 77
Join date : 2016-08-08
Location : Wolverley, Worcestershire.

Back to top Go down

Main Jet

Post  piston 197 on Thu Dec 08, 2016 8:41 pm

Andrew it is unlikely to be the size of the main jet, the full diameter of the main jet is not utilised until 3/4 to full throttle opening, pick up from tick over to 1/4 throttle is controlled by the pilot jet, slide cut away and the taper of the throttle needle. so if it is bogging down it is very unlikely to be influenced by the main jet size. If it is not revving out cleanly from 3/4 to full throttle opening then you main jet may well be the culprit

JH
avatar
piston 197
Moderator

Posts : 3516
Join date : 2008-08-17
Location : ross-on-wye

Back to top Go down

Re: 8E main Jet

Post  Andrewwoey on Thu Dec 08, 2016 8:52 pm

piston 197 wrote:Andrew it is unlikely to be the size of the main jet, the full diameter of the main jet is not utilised until 3/4 to full throttle opening, pick up from tick over to 1/4 throttle is controlled by the pilot jet, slide cut away and the taper of the throttle needle. so if it is bogging down it is very unlikely to be influenced by the main jet size. If it is not revving out cleanly from 3/4 to full throttle opening then you main jet may well be the culprit

Thanks Piston. Yes, i understand the way the carburetor works.
I need to go through every thing. Need to check the timing aswell as going through the carb. I enjoy modifying and setting up 2 strokes. First one i tuned and set up was when i was 15. Now 46 and still learning. This is my first british bike and got more to learn Very Happy


JH

Andrewwoey

Posts : 77
Join date : 2016-08-08
Location : Wolverley, Worcestershire.

Back to top Go down

Re: 8E main Jet

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum