Hi Guys

I am finally putting back together my NSR with Tyga RS front and MC28 tail like the Tyga guys built the Rothmans on there web site, but i have done it in Marlboro like Biaggi's YZR500.

Problem is i have 2 (maybe 3) fuel taps, all of which leak. I see they are closed riveted together. Has anyone ground the heads off and replaced 'o' rings etc and reassembeled successfully?

Cheers, Mark

I just bought a new one bro. I haven't gone inside one to see how the actual sealing is done (even though i'm a plumber so chances are i've got the right size seals sat in the van), but if you're gonna blow heaps of $$$ on new fairings etc then surely you can stretch to a new fuel tap and you won't have to worry about it ever again. Cobble the old one back together to keep it going by the skin of its teeth and you don't know how long (or if) it'll last before its a problem again.

One thing i've learnt whilst i've lived here is that there's a very fine line between ingenuity and bodge work. In this case the risk is that you'll try to start your bike up after leaving it for a week or two, only to find the crankcase, lower cylinder and its exhaust all full of petrol (if the float valves are passing - which happened to me!). Get a fresh tap and you know for a fact it'll be good.
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After years of moaning about immigrants now i am one...

Thanks for the reply Hermit,

I presumed that

1/ they weren't available

2/ were horrificly priced.

How much did you pay and was it the normal NSR part you sourced or off a later bike?

Already had the flooded problem before i bought new fairings etc.

PAINFULL!

Agreed about the painful part - the flooding kinda did me a good service though because the bluey/green premix started seeping out of a leak in the crankcase join where the useless blue hylomar had been eaten away by the fuel - plainly revealing the problem to me. I've since been using Threebond 1207B due to Matt@Tyga's recommendation. Its dear but its nicer to work with and withstands solvents far better than hylomar - which comes straight off with a dab of acetone, whereas the 1207B laughs in acetone's face and only comes off with Threebond's own gasket remover, which is HARSH stuff.

I thought i got my new tap from Tyga but i can't find it in my order history so maybe i got it from econohonda in Te Aroha. They have a stock list pdf file on their site that you can match part numbers against to see if they have what you want. http://www.econohonda.co.nz/ They probably have a few.

Normal MC21/28 taps are still available and tyga (for example) stock them at $90NZ but you have shipping on top of that.

If you try to order one from a Honda dealer like city Honda in Palmy, then yeah, the price is either ridiculous or they can't get it for some reason... But that's all due to the NZ wholesaler (Bluewing Honda) setting super high prices for everything and being generally dissapointing to deal with.

I've dealt with econohonda a few times now and they're pretty good, and you can always fall back on Tyga if you can justify the shipping cost by buying several other items at the same time. As i always try to do.
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After years of moaning about immigrants now i am one...

i bought a new one from honda a month or so a go was only £12.
you can take them apart by drilling out the rivets and they're sealed with an "O" ring inside!
easy to do!
but you get peace of mind buying a new one and it comes with a new tank filter too!!
every ones a winner!!

I got a new one recently,30euro!

do you know if they are shared with other bikes? Sourcing NSR parts in Aus from a Honda dealer is an outright pain.

They are easily repairable.

The sealing mechanism is a spring, ball bearing, and a o ring rubber which is shaped to form a figure 8.

You will find that an accumlination of crap has worn out the o rings.

I just turned the o ring part over , gave the spring a bit of a stretch, everything a good clean and re assembled using M4 screws and nuts. Using new o rings would be better but I didnt have any at hand.

The tap now holds OK, so there is no rush to buy a new one.

They are only £18.50 here in the UK from Lings.
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Russ

MC21SP

Thanks guys, i didn't think it could be too complicated. Will give it a go.

Jeez 12 pounds, I wish could stuff that cheap here!!!

Our Honda importer will just say "no longer available" almost without exception.

Will have a crack at the repair but nice to know Tyga have them. Never thought to look there.

Mark

i had a leaky tap on a RC30 that had been standing for about 18months ,i took the tap off left it socking in petrol for a few days , put it back on and no more leaking

the o,rings seals dry up and shrink , letting them sock in petrol brings them back to life (sometimes)

just thought id say that i fixed a leaking fuel tap on my mc16. drilled out the rivets , tapped threads, put a new o ring in and no more leaks. easily done