G’day
Why do the fuel pipes vary between an FE and F2 ?
The F2 ones are just straight joining both carbies and the FE ones , still joining both carbies but tee off and go up into the box above the carbies!
whats the go there ?
Thanks…
I think the pipes you’re looking at could be the venturi air pipes for the diaphragms of the paired carbs.
Hi Scratcher
Yeah i think you’re right , the black plastic ones.
But why are they different the reason i’m asking is i built up a bike from bits an FE , then i bought a spare bike for bits also an FE .
The one i put together does not have the venturi air pipes going up to the air box yet the other one does , does that mean i have F2 pipes and air box do you think i should change them over?
Thanks…
Better ask bif. I’m not so up on the differences to the f2?
Hi Bluey,on the E model including the R the air pipes joining the carb pairs vent into the aluminium base of the air box under a small plate held in place by a single screw.The FF,F2F,RF and RG carbs air pipes join onto a hose which vents to atmosphere just above the rear shock top mount.Mr Honda must have had a reason for this mod to which Teambif is not privy.Apart from the mismatch in pipe diameters I see no reason why the carbs wont swap across models.Regards BIF.
G’day bif
So you reckon it will be ok to run with the pipes i have (not going up to the air box) ?
Thanks …
Give it a go,whats the worst?
Send a pic of what you have,I may well have anything you are missing.
Later models ran pipes venting to atmosphere,the jetting was altered to compensate for no negative pressure in the float chamber
And the float heights are different by 1mm as well.
Your carbs have been fitted with the revision kit,just check the size of the main jet,it should be 115 if the whole jobs been done
It has been fitted backwards tho,the vent should exit at the rear of the carbs to atmosphere
Yes they come with the kit,looks like it’s been a proper job,just baffled as to how they got the pipes mixed up
The carbs have worked fine up to now so I would probably just leave them as is.
Finding a route for a pipe may present more problems than fitting one is going to solve
The carbs will have had 145 mains originally before the revision kit was fitted,your thinking is sound I would use the 120 jets too
My manual says 7.5mm for the RE and 8.5mm for the RF/G.
Modified float height? I’m not sure what you mean.
Hoping I can gatecrash this topic. Just sorting out a non running bike that I bought (F2) The last owner tried to get it running unsuccessfully, when I was checking through it I found that he has broken a piece of the carb body off. I’ve managed to get a donor bike but even though they two bikes are only 150 units apart the parts bike has the earlier style carbs which are in quite a state with quite a few seized bits and seem just slightly different.
I’m tempted to try some JB Weld on this and see if it leaks. Any thoughts?