Search found 411 matches

by Gui.dorey
Sat May 31, 2025 10:20 am
Forum: Four stroke
Topic: 1954 NH - blown head gasket
Replies: 5
Views: 2015

Re: 1954 NH - blown head gasket

Hi
Maybe I’m confused and it is a copper gasket. Can’t remember anymore. I’ll check when I open it up.
by Gui.dorey
Fri May 30, 2025 9:00 am
Forum: Four stroke
Topic: 1954 NH - blown head gasket
Replies: 5
Views: 2015

Re: 1954 NH - blown head gasket

Hi Simon,

The head is cast iron, but the gasket on my engine is paper, not copper.
by Gui.dorey
Thu May 29, 2025 7:13 pm
Forum: Four stroke
Topic: 1954 NH - blown head gasket
Replies: 5
Views: 2015

1954 NH - blown head gasket

Hi everyone,

My 1954 NH was running very well since the rebuild, but on my last ride and coming up to the first 500 mi service, I suddenly felt it loosing power. Luckily just a few miles from home and was able to get back. As it turns out, the head gasket blew around the front right corner.

The ...
by Gui.dorey
Mon Jan 13, 2025 6:16 pm
Forum: Main Chat Forum
Topic: Valve guides for exposed valves
Replies: 33
Views: 21332

Re: Valve guides for exposed valves

Would something like this work? Not sure if the material would be suitable…
https://www.ebay.de/itm/263246866985?mkcid=16&mkevt=1&mkrid=707-127634-2357-0&ssspo=sjc0MlrHSDm&sssrc=4429486&ssuid=uGyyOvnqRW-&var=&widget_ver=artemis&media=COPY

https://www.ebay.de/itm/263325017056?mkcid=16&mkevt=1&mkrid ...
by Gui.dorey
Mon Dec 16, 2024 8:54 am
Forum: Four stroke
Topic: Mk 1 Square 4 piston clearence
Replies: 12
Views: 2822

Re: Mk 1 Square 4 piston clearence

It wasn‘t that difficult, and there wasn’t any distortion. Just be sure to put something between the jaws of the lathe and the piston so as not to score the skirt. The IMD pistons have enough thickness to skim the tops down to flat, also confirmed by IMD themselves. I gave them a ring and they were ...
by Gui.dorey
Fri Dec 13, 2024 7:49 am
Forum: Four stroke
Topic: Mk 1 Square 4 piston clearence
Replies: 12
Views: 2822

Re: Mk 1 Square 4 piston clearence

The thread Paul posted was mine. Here’s a short summary of my experience:

I used IMD pistons, which are actually for a MKII and have a raised top. My head and barrel had been skimmed more than they should have, so I ended up with a very high compression. This caused the head gasket to blow after a ...
by Gui.dorey
Thu Nov 28, 2024 7:26 pm
Forum: Four stroke
Topic: 1950 VB trouble starting
Replies: 29
Views: 9474

Re: 1950 VB trouble starting

Hi Bevan,
I never liked fuel filters. In my experience they cause more problems than they‘re worth, like air locks for example, so I never use them. Maybe there lies the problem…

Glad to hear she‘s running well again.

Cheers,
Gui
by Gui.dorey
Sat Nov 16, 2024 11:08 am
Forum: Four stroke
Topic: 1950 VB trouble starting
Replies: 29
Views: 9474

Re: 1950 VB trouble starting

Hi Bevan,

Also check if your exhaust lifter is not stuck or touching the ex valve when hot. Sometimes it’s a simple thing like that. And as said before, recheck valve clearances.

The spacer is always a good idea, but I would doubt that’s the problem and would suspect the ignition. Check points ...
by Gui.dorey
Sat Oct 05, 2024 7:31 pm
Forum: Four stroke
Topic: Sq 4 adjusting the clutch cable
Replies: 3
Views: 1372

Re: Sq 4 adjusting the clutch cable

Yes, i shall probably have to do that. I just hope there’s enough adjustment there without the lever hitting the inspection cap…
by Gui.dorey
Sat Oct 05, 2024 1:46 pm
Forum: Four stroke
Topic: Sq 4 adjusting the clutch cable
Replies: 3
Views: 1372

Sq 4 adjusting the clutch cable

Hi everyone,

Does anybody have any tricks on how to adjust the clutch cable? The adjuster is hidden behind all the oil pipes and I can’t get to it…

Cheers,
Gui