Search found 24 matches

by Antoni
Fri Apr 27, 2018 10:36 pm
Forum: General Banter
Topic: Transmission
Replies: 0
Views: 268

Transmission

Sitting here bored shitless on a non-working day. I'm doing time working in the States Mid West. Just heard the resident small Kawasaki twin leave the apartment building. Loud as always. But it's the way he handles the gearbox and clutch that made me laugh once again. Everybody drives automatics her...
by Antoni
Sun Sep 24, 2017 3:38 pm
Forum: Biking Chat
Topic: Free tax! and no MOTs!
Replies: 5
Views: 1611

Re: Free tax! and no MOTs!

I think I am wrong. It's the EU directive itself that gives separate time scales for bikes/trikes and cars - this article explains its best if you're interested: http://motorcycleminds.org/2017/09/20/mot-exemption-curbing-enthusiasm/ "It is worth noting at this point that motorcycles at present are ...
by Antoni
Fri Sep 22, 2017 2:07 am
Forum: Biking Chat
Topic: Free tax! and no MOTs!
Replies: 5
Views: 1611

Re: Free tax! and no MOTs!

My understanding is that it applies to cars but not motorcycles...
by Antoni
Tue Aug 30, 2016 1:53 am
Forum: Technical Advice
Topic: RUNNING IN 2 STROKE
Replies: 8
Views: 1282

Re: RUNNING IN 2 STROKE

Some more thoughts. When things heat-up they distort, this is why pistons are oval when cold. Two stroke cylinders, because of their design, distort more than four strokes. You need to put some miles on your bike to run it in, how many miles is up to you I would have thought. Every time you ride yo...
by Antoni
Sat Apr 02, 2016 1:43 am
Forum: Technical Advice
Topic: Triumph T90 Amal Carb query
Replies: 6
Views: 1327

Re: Triumph T90 Amal Carb query

That's the line I took with the Triumph 21 I had. It seized going up a long hill - it turned out because the main jet was too small in the wrong carb fitted. If I hadn't ever gone up a long hill probably would never have known. Fitting a bigger jet afterward it certainly ran better! My point is, mak...
by Antoni
Sat Aug 01, 2015 2:44 pm
Forum: Technical Advice
Topic: Water in my carb
Replies: 6
Views: 980

Re: Water in my carb

Bit late to comment on this thread but here goes.. It's possible that you 're getting carb icing. For the benefit of those wot don't know (there may be a few) the way a carb works encourages ice to form in the venturi under some conditions of temperature and humidity. It happenned to my brother in t...
by Antoni
Sat Jan 17, 2015 4:35 am
Forum: Technical Advice
Topic: Triumph Twenty-One engine advice sought
Replies: 36
Views: 3554

Re: Triumph Twenty-One engine advice sought

Interesting ideas from Coxy. I've heard that trying to be kind to a 2-stroke by putting more oil in the premix can lean-seize it because of increased fuel viscosity - but going leaner on the oil to compensate for higher density petrol? AFAIK there isn't a direct relationship between density and visc...
by Antoni
Wed Nov 19, 2014 6:06 pm
Forum: Technical Advice
Topic: Triumph Twenty-One engine advice sought
Replies: 36
Views: 3554

Re: Triumph Twenty-One engine advice sought

As any comments are welcome, may I say that your experience is uncannily like what has happened to my 650, except I can't blame a previous owner? I didn't know what you were getting at there about the previous owner. Anyway, I'm a happy bunny. After replacing the barrel and pistons and hearing that...
by Antoni
Fri Nov 14, 2014 5:38 pm
Forum: Technical Advice
Topic: Triumph Twenty-One engine advice sought
Replies: 36
Views: 3554

Re: Triumph Twenty-One engine advice sought

The bike has now done aboout 40 miles with a service exchange +.020 barrel and rings, and replacement bare Triumph +.020 pistons from a different source. Used the same gudgeon pins new circlips and home-made gaskets. Copper head gasket annealed. I still don't know what caused the original failure. A...
by Antoni
Thu Oct 30, 2014 5:52 pm
Forum: Technical Advice
Topic: Triumph Twenty-One engine advice sought
Replies: 36
Views: 3554

Re: Triumph Twenty-One engine advice sought

surely if you increase the bore size the volume at tdc will increase ??? :? Looking at it simplistically, imagine a barrel where a simple flat piston rises to level with its top edge. Above is a head with a simple hemisphere space with its base the same diameter as the barrel's bore. The sweep of t...