1957 NH / Sludge Trap

[Simon.Gardiner]

A not uncommon problem....
Maybe some other thoughts in these:
viewtopic.php?p=79676
viewtopic.php?p=66733
viewtopic.php?p=29875

SG

[JohnnyBeckett]

hi, you can get new sludge traps with metric heads i think Drags do them

[Stevethomas]

Thank you for all the ideas.
I wonder if there's clearance for the irwin. My local screwfix has a set in so I may be able to measure before I buy.
If that's no good I think the crank has to come out.

[nevhunter]

Belt it Hard with short sharp blows and that will help loosen the threads then lie the bike on it's side Protect things with card board and weld a very short bolt to the damaged Hex. Earth the flywheel. You don't want the current going through the Ball races and ruining them. I've Always got them out. There's a lot of work stripping the Motor IF you don't need to. Nev

[charles.bulloch]

If you remove the barrel you can get at the sludge trap with a cold chisel. Don't ask me how I know.

[JohnnyBeckett]

hi toolstation allso do another set of minotaur bolt grip nut remover set they may be thinner diameter to get onto the trap head , and also get the right size hex ( 6 sides ) socket to fit the new sludge trap

[Stevethomas]

SUCCESS!
I used an 11mm / 7/16 bolt grip (ebauer, screwfix, £18) and after one pull with a bar there was so little drama I thought it was slipping.
And the trap was clear.
New trap in now.
Timing pinion nut I used to spin crank was little more than finger tight though, typical for this bike so it's good that I found it. The idea was something which didn't need too much work, I've already got a long project.
Might be running again later today before I look for source of gearbox noise.

[nevhunter]

Usually the sleeve Gear and the One it engages with. Check bushes aren't loose as well. 4th gear is direct so it SHOULD be quiet. Magnetic Drain Plug is a good idea. Replace seals They leak at the speedo drive cable end . Nev

[simon.holyfield]

When you clean the trap out, did you feel up towards the big end?

[nevhunter]

Have you got any idea how many miles this bike has done? 350's are not as hard on the gearbox as bigger motors are. Nev