SOHC.co.uk Forums > CB500/550
CB550 Tuning Advice
Oddjob:
NBR on the fuel lines means Nitrile IIRC. I would change them to Viton if possible. The rubber debris could be coming from the inside of the fuel lines and that amount will be blocking some of the jets I'd imagine.
McCabe-Thiele (Ted):
When I first fired up my 500 after it's full rebuild it ran great, next time it ran like a pig.
The temporary petrol tank that I bought online came with petrol pipe that I used.
The pipe went sticky to the touch over a few days.
Carbs were full of black bits from the pipe.
I was gutted and demoralised to have to remove the carbs, dismantle them and clean them all over again.
I had to leave it for a couple of weeks as I was so ***** off having to do it all again.
Sesman:
Yup, same thing happened to me. I sourced mine from the attached and the pipes broke up depositing bits just like that blocking the jets. Claimed to be Nitrile. I am neither recommending nor condemning the supplier.
Does anybody out there know of another supplier with whom they have not had a similar experience?
K2-K6:
I've bought and used fuel pipe from here
https://www.ebay.co.uk/itm/405924654488?var=676233395444
Honestly described and so far it has not been affected by deterioration. It needs more evaluation from anyone on here to back that up, more specifically in leaving it containing fuel over greater length of static/low use scenario in providing more extensive feedback.
So far, no observable failure for me.
McCabe-Thiele (Ted):
I used Gates Fuel Pipe as it was fitted to my 500 by Gerben iirc. .
https://www.ebay.co.uk/itm/334357613189
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