Search found 116 matches

by bob cottam
Sun Jun 30, 2024 9:45 pm
Forum: Main Chat Forum
Topic: Downloading G/box spares list...... help...
Replies: 2
Views: 1221

Downloading G/box spares list...... help...

Hi All, apologies if this post is repeated...... Can anyone help me download a Gearbox Spares List from the Spares page?

All I get is "file cannot be downloaded securely"

I contacted Simon who suggested turning down/off security for a minute just to download this file but that just momentarily ...
by bob cottam
Wed Oct 14, 2020 11:47 am
Forum: Four stroke
Topic: sq 4 oil pressure....
Replies: 15
Views: 5522

Re: sq 4 oil pressure....

Hi John, re the gauges, ever cautious, I did wonder about this.
I decided in the interests of Science and Advancement to do some field (workshop) research here to find out just how good or bad is the accuracy of the various small pressure gauges I have available.

I tested seven gauges with foot ...
by bob cottam
Mon Oct 12, 2020 5:13 pm
Forum: Four stroke
Topic: sq 4 oil pressure....
Replies: 15
Views: 5522

Re: sq 4 oil pressure....

Come again John.....????
by bob cottam
Sun Oct 11, 2020 5:43 pm
Forum: Four stroke
Topic: sq 4 oil pressure....
Replies: 15
Views: 5522

Re: sq 4 oil pressure....

Thanks Paul, I took the sump plug out yesterday as I could see from the oil tank level that it had wet sumped. I drained the crankcase out completely and about 350cc oil came out. I placed a clean container under the sump overnight,but only a little more came out, perhaps 20cc. I have watched all ...
by bob cottam
Sun Oct 11, 2020 1:53 pm
Forum: Four stroke
Topic: sq 4 oil pressure....
Replies: 15
Views: 5522

Re: sq 4 oil pressure....

AHA!! Found it!- my missing oil pressure was there all along....

I decided to investigate my seemingly poor oil pressure a little further. My existing pressure gauge is tapped into the rocker line at the far end, where it feeds the rockers. I was suspecting the cam oiler kit to be bleeding off a ...
by bob cottam
Thu Oct 01, 2020 11:34 am
Forum: Four stroke
Topic: Special alloy rings for riviting to primary chain wheel to stop oil leaking
Replies: 11
Views: 4110

Re: Special alloy rings for riviting to primary chain wheel to stop oil leaking

I don`t know what the differences are between the Sq 4 and single chaincases in terms of room?, but i did have to file/trim the rings a little to get them to be as close as possible to the chain case wall without fouling. This of course meant several attempts involving re-assembly to check. I seem ...
by bob cottam
Wed Sep 30, 2020 9:25 pm
Forum: Four stroke
Topic: Special alloy rings for riviting to primary chain wheel to stop oil leaking
Replies: 11
Views: 4110

Re: Special alloy rings for riviting to primary chain wheel to stop oil leaking

Hi, I installed these on my square four. I took great care with the job, and they seem to be a complete success- not a drop of oil leaks now so i would recommend them, Best Regards, Bob.
by bob cottam
Wed Sep 30, 2020 9:23 pm
Forum: Four stroke
Topic: Special alloy rings for riviting to primary chain wheel to stop oil leaking
Replies: 11
Views: 4110

Re: Special alloy rings for riviting to primary chain wheel to stop oil leaking

Hi, I installed these on my square four. I took great care with the job, and they seem to be a complete success- not a drop of oil leaks now so i would recommend them, Best Regards, Bob.
by bob cottam
Sat Jun 06, 2020 1:42 pm
Forum: Four stroke
Topic: Sq4 Block to crankcase spacer?
Replies: 8
Views: 2533

Re: Sq4 Block to crankcase spacer?

Hi, What pistons are you using?- I had this issue too and I found that the IMD pistons have a crown height that is significantly higher than say, Hepolites. Somewhere on this forum I posted a photo to illustrate this with one of each type of piston linked side by side with the same gudgeon pin. I ...
by bob cottam
Sun Jan 05, 2020 2:35 pm
Forum: Four stroke
Topic: Smiths Chronometric S433/1/L threads
Replies: 18
Views: 5837

Re: Smiths Chronometric S433/1/L threads

Surely the clue is in the name: ChronoMETRIC....