Honda CB450 Ep 6 - Keihin carburettor strip down

[@trucktruck8016]

Ref your mixture screw seals - the cheap low grade fuels available now in the UK are 10% ethernol which destroys rubber o-ring's/seals in the fuel system , nitron rubber is meant to be able to survive the low grade fuel , try and sorce 'o' rings/seals made from nitron rubber , also stick to premium fuel ,less ethernol and the bike runs better on premium .

[@ratmotors903]

Thanks. All seals and o-rings are good. 97 used in tank. Most kits come from USA where they have a much higher percentage of ethanol. As far as I’m aware those I’ve used are nitrile which are good in 10% ethanol environments. Best tip is to make sure fuel doesn’t sit for long periods of time in carbs. Fuel additives are good practice too.

[@Mahi-ux1ne]

Good video. What about the felt throttle shaft seals, are you going to replace them? I’m still in the progress of doing that, apparently they brittle over time quite a bit and affect the idle mixture, causing poor running.

[@ratmotors903]

Hi. Not considered that! Thanks for the tip. Striped one throttle assembly just now and they do look a bit nasty. Managed to get some that might fit that are for Piano strings. Where have you sourced from?