Search found 895 matches

by robjameson
Thu Mar 07, 2024 8:34 pm
Forum: Four stroke
Topic: Mk2 square 4 compression test
Replies: 7
Views: 281

Re: Mk2 square 4 compression test

I did a compression test on my ‘48 4G last year, when I was having some running issues and needed to rule compression out. Using a good quality tester I borrowed from work and with WOT I was a pretty even 95psi on all 4, so I’d say your figure on a MK2 with higher compression pistons is in the right...
by robjameson
Wed Feb 07, 2024 1:53 pm
Forum: A Bad thing happened to my Ariel
Topic: KH Crankcases
Replies: 15
Views: 2999

Re: KH Crankcases

I don’t need to, he did that too!
by robjameson
Wed Feb 07, 2024 10:19 am
Forum: A Bad thing happened to my Ariel
Topic: KH Crankcases
Replies: 15
Views: 2999

Re: KH Crankcases

Well I’d delayed sending off the cases due to being busy with life in general, I finally sent them off last week to the welder. Imagine my surprise when I got a message on Monday to say they were done and they arrived back through the door this morning. That’s a one week lead time and a cracking job...
by robjameson
Fri Feb 02, 2024 1:33 pm
Forum: Four stroke
Topic: KH primary chain alignment
Replies: 26
Views: 2121

Re: KH primary chain alignment

This would make a huge amount of sense. I had been wondering what was done to account for the different mainshaft on the FERC models.

Could it be that the factory simply found that the FH sprocket fitted nicely, and no further work was required?
by robjameson
Sat Dec 23, 2023 10:26 am
Forum: For sale/wanted - Parts, and those bits and bobs
Topic: wanted
Replies: 18
Views: 1061

Re: wanted

I saw one for sale on eBay a few years ago. Clearly people knew what it was because the final price was gigantic, I think between £2-300.

It wouldn’t surprise me if Draganfly sell a pattern one.
by robjameson
Sat Dec 23, 2023 10:23 am
Forum: Four stroke
Topic: KH500 Lean Running Problems
Replies: 14
Views: 1322

Re: KH500 Lean Running Problems

There is no specific instruction to use a sealant for the Otto gasket, but it certainly wouldn’t hurt to use some high temperature RTV around the pushrod tunnels to assist in preventing leaks.
by robjameson
Mon Nov 27, 2023 7:54 pm
Forum: Four stroke
Topic: SQ4 only runs with choke
Replies: 19
Views: 1332

Re: SQ4 only runs with choke

The easiest way to find an air leak (in my opinion) is to buy an aerosol can of brake cleaner and spray it all around any joints on the intake, if the revs increase, you have a leak, and you can pinpoint quite accurately with little sprays around the area. My personal thought with this particular pr...
by robjameson
Mon Nov 20, 2023 7:22 pm
Forum: Four stroke
Topic: Ariel square 4 misfire
Replies: 24
Views: 1334

Re: Ariel square 4 misfire

I’m running WR7BC on my 1948 4G. Bike runs perfectly when hot but misfires cold, which I need to get to the bottom of, I think it is carburation, never considered plug temperature setting, is it worth going up to an 8 or 9?
by robjameson
Sun Nov 12, 2023 6:00 pm
Forum: Four stroke
Topic: Ariel square 4 misfire
Replies: 24
Views: 1334

Re: Ariel square 4 misfire

I don’t use NGK plugs for exactly that reason, having had several issues with the plugs over the years, mostly due to the difficulty in finding genuine plugs!

I’ve used Bosch plugs for a long time now and had no issues.
by robjameson
Wed Nov 01, 2023 6:17 pm
Forum: Ariel Talk
Topic: ISDT Ariels
Replies: 8
Views: 768

Re: ISDT Ariels

If you join an organisation called GLASS, which is the green laning association, they can advise you on legalities.

There used to be an app called ViewRanger which mapped green lanes, but it appears to have been switched off.

Sounds fun!