Carb repair kits

[Kraptanaman]

Aftermarket or genuine?  Is there much difference?

[imago]

Some aftermarket kits are decent, some are utter sh1te. I had a set from Wemoto for the ET and they appeared decent in terms of finish on the float valves etc. They've been in two years (maybe three?) and are fine. A mate got a set for a not-suzuki from Eblag and they were piss poor. The threads all looked like they'd been carved in with a stanley blade.

So I would say if you're getting aftermarket stuff then get them from a reliable shop/trader and you should be OK.

[wsn03]

On 6/23/2018 at 6:42 PM, imago said:

Some aftermarket kits are decent, some are utter sh1te. I had a set from Wemoto for the ET and they appeared decent in terms of finish on the float valves etc. They've been in two years (maybe three?) and are fine. A mate got a set for a not-suzuki from Eblag and they were piss poor. The threads all looked like they'd been carved in with a stanley blade.

So I would say if you're getting aftermarket stuff then get them from a reliable shop/trader and you should be OK.

I'd dispute this and suggest oem only.

All the "specialists" fail to get needle float valves that last more than a few weeks. They totally shag your engine too. For some reason people keep giving them business

[Crass]

On 7/24/2018 at 4:38 PM, wsn03 said:

I'd dispute this and suggest oem only.

All the "specialists" fail to get needle float valves that last more than a few weeks. They totally shag your engine too. For some reason people keep giving them business

But surely the Wemoto kit which #imago has in his ET disproves this statement?  He based his reply on experience over a period of 2/3 years.  Personally I've found Wemoto aftermarket stuff to be good quality.

[wsn03]

12 hours ago, Crass said:

But surely the Wemoto kit which #imago has in his ET disproves this statement?  He based his reply on experience over a period of 2/3 years.  Personally I've found Wemoto aftermarket stuff to be good quality.

Ive not tried Wemoto - im interested if this is the case. Ive had experience of most of the other well known specialists, needle float valves leaking from brand new, shocking. I once restored a set of GPZ carbs for a mate, did a careful and stunning paint job on them. Bench tested them and fuel pissed out everwhere completely destroying my paintwork!

The issue is with any claims, have they been bench tested? Sticking them on a bike with a vacuum feed set up gives one the impression all is well because most of the time the feed is off. The only way to be properly sure all is well is to gravity feed fuel to the carbs and leave the feed on a few hours. The only thing holding the fuel back then is the needle float valves.

 

Ive only ever seen Makuni oem.pass this test. Anything failing it will seep fuel into the engine. If the oil smells of fuel you know what's been causing it.

 

Has anyone bench tested Wemoto valves this way? Would be great if they work and for as long as the oems

[imago]

On 7/24/2018 at 4:38 PM, wsn03 said:

I'd dispute this and suggest oem only.

All the "specialists" fail to get needle float valves that last more than a few weeks. They totally shag your engine too. For some reason people keep giving them business

As with anything, you can only speak as you find. The problem with empirical evidence for bike parts is that you will always be up against quality control and supplier changes.

 

So I can say without fear of contradiction, and with proof, that the float valves that I bought from Wemoto were and are fuel tight. What I can't say is that buying from them or another source today would give the same results. Equally neither I (nor anyone else) can say that buying OEM today will be better quality for the reasons mentioned above. 'You pays your money' etc.

As for bench testing, yes is the answer. Purely because the carbs are such a pain in the arse to remove and refit. However, that test is only useful if you go away from the OEM vacuum tap, which in itself demonstrates that Suzuki weren't completely confident in the capabilities of the float valves they were fitting when the bikes were new.

Edited August 1, 2018 by imago

[jonny1bump]

Check emulsion tubes and needles they normally worn and use OEM.

Do not use Dynojet kit tubes oval in no time at all.

[wsn03]

On 8/1/2018 at 10:09 AM, imago said:

 

As for bench testing, yes is the answer. Purely because the carbs are such a pain in the arse to remove and refit. However, that test is only useful if you go away from the OEM vacuum tap, which in itself demonstrates that Suzuki weren't completely confident in the capabilities of the float valves they were fitting when the bikes were new.

My 750F doesnt have a vac tap

My Bandit does but i just use a remote tank. Im really intrigued by Wemoto 

[imago]

11 minutes ago, wsn03 said:

My 750F doesnt have a vac tap

My Bandit does but i just use a remote tank. Im really intrigued by Wemoto 

Vac taps were only fitted to avoid leak down if the float valves were off or got some crap under them. If OE float valves were all 100% then the manufacturers wouldn't have gone to the expense of fitting vac taps.

The only info I can add to the above is that they carb parts wemoto supply are made in Japan. So I guess it's possible that they are OE or at least made to the same specs as the original.

[jonny1bump]

Don't forget your old strokers in our youths had on and off taps rather then vac taps always got to turn them off when parked on slopes and side stands etc, they always gonna week fuel where they shouldn't if there is constant supply, last thing you want is weep into barrels and contaminate petrol or worse hydraulic.

[wsn03]

30 minutes ago, jonny1bump said:

Don't forget your old strokers in our youths had on and off taps rather then vac taps always got to turn them off when parked on slopes and side stands etc, they always gonna week fuel where they shouldn't if there is constant supply, last thing you want is weep into barrels and contaminate petrol or worse hydraulic.

My 750 F has an on/off tap. I use fuel filter to keep it all super clean

[wsn03]

1 hour ago, imago said:

Vac taps were only fitted to avoid leak down if the float valves were off or got some crap under them. If OE float valves were all 100% then the manufacturers wouldn't have gone to the expense of fitting vac taps.

The only info I can add to the above is that they carb parts wemoto supply are made in Japan. So I guess it's possible that they are OE or at least made to the same specs as the original.

Anything made in Japan is usually top spec and reliable. I wonder if they are Mikuni....

[imago]

10 hours ago, wsn03 said:

Anything made in Japan is usually top spec and reliable. I wonder if they are Mikuni....

Possibly, I can't imagine it'd be worth setting up the tooling etc from scratch to make them given the relatively low numbers they'd sell. If you already have it you'd probably make a small  profit.