Re-fitting NC30 carbs.

[Phil_Norwich]

Evening all,

After my last post about my bike not starting I have drained all the old fuel and taken off the carbs for a clean. I fitted new carb rubbers whilst I was at it as the old ones looked a bit past it. I've got them all the right way up but for the life of me can't seem to get them to fit back on the bike.

The front left slots in absolutely fine. The front right however I can only seem to push in 3-5mm or so and it doesn't want to go any further. I didn't expect the rears to line up, the rear left doesn't look too bad. But the right hand side is offset by 10-20mm. I'm guessing as the front right goes in more it will line up a bit better...

I've put a bit of rubber grease on to help ease them in. Any tried and tested ideas to make them fit?

[Drunkn Munky]

Save yourself the headache and get some rvf rubbers, your be amazed how much easier they go on.

[ibby4585]

You have got the rubbers the right way around haven't you?

They say which way on the carb rubbers. And don't tighten anything up just push the fronts in half way then leaver the backs in with a screwdriver.

[Phil_Norwich]

Yeah I beleive so, the side which says "up" on them is facing upwards. Nothing is tightened up, its just the front right doesn't want to seem to push in.

[ibby4585]

And you are sure nothing is getting jammed as push them down?

Everything should be square so the fronts should sit in level.

[Phil_Norwich]

I'm pretty sure, I'll double check tomorrow. Everything looks square, I'll attempt take 2 tomorrow.

[jay3]

I use some silicon grease and a rubber headed hammer.
Put the fronts in, line the backs up, pushing forward a bit, a couple of gentle taps with rubber headed hammer, just enough so they can be pushed down by hand and they slip in easy. Well, not exactly easy, but easier than trying to force them in my hand alone.

[Deviant400]

yea tiz a bitch sometimes , i get the fronts in then use an old large flat headed screwdriver that ive blunted and rounded off to prise the rears in , if its the first time it can be a pain but once you've done it a few times you get a knack for it , just check with a torch once in that there seated good all round ,

[CRM]

As above, fronts in first, rears will sit slightly out and just need a tease in with a blunt screw driver.
old dried out carb rubbers make this near impossible and a load of stress. new ones are a few quid each and make this job so so easy

[Cammo]

If it's your first time patience is the key.

You don't want to be putting the front carbs in all the way, just seat them a little bit in the front rubbers.The trick then is to pry the rears in a little bit (using a flat screwdriver) without the fronts popping out.

When all 4 are in a little bit push down firmly with even pressure. If the pressure's not even some might pop out. I stand on them (yes stand!) to make sure they're all seated firmly. Use a torch to check each of them afterwards and then tighten the top 4 clamps.