SOHC.co.uk Forums > CB750

Pilot jet internal diameter

(1/2) > >>

Read Replica:
First post on here guys and it's a request for info on the size of the pilot jet internal bore on a 1978 F2 Phil Read Replica.
Trying to get the old girl going again after years of none use. During carb cleaning I have pulled the pressed in pilot jets out to check for restrictions. Looking at either end of the jet the bore seems to be of similar size, and I can get a pin into the jet from either end but not all the way through. At the point where the jet tapers down externally the pin will go no further. Am I correct in thinking that the internal bore reduces substantially towards the middle of the jet.  The only wire I can get through fully is a strand on copper wire that is almost hair like in diameter.

Bryanj:
On the US site they insist that the number on the jet is the size in 100's of a mm BUT i cannot confirm that.

The 550 pilot jet needs 2 or 3 strands of electrical muliticore flex to clear the jet from memory.

There is one place in Canada or US that supplies the jets pattern, if i can find the link i will post it or go to www.sohc4.net and search pressed in pilot jets

Read Replica:
Thanks for that info Bryan. Yes, can only get a single strand through all 4 jets. Double up and it's a no go.

SteveD CB500K0:
Put your location in your profile and it will show up on your posts.

There are quite a few PRR owners on here - some may be close enough to lend a hand.

When it is back on the road - I can introduce you to Phil if you'd like the bike personally autographed.

Steve

Bryanj:
Try reading this page

http://www.motorcyclecarbs.com/Keihin_Pilot_Jet_N424-22_Press_C2453.cfm

NOTE i have not used nor dealt with this supplier so cannot vouch for anything stated

Navigation

[0] Message Index

[#] Next page