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Bike Preparation / Re: Class F
« Last post by Paul K on Today at 07:12:02 am »
The tyres on the project are Continental TKC80.  I found them good on wet and dry tarmac on a GS500 twin and a W650 twin.  On the 500 cc, I got about 6,000 miles out of the rear tyre and about 9,000 miles out of the front.  On the 650 cc, I got about 2,500 miles out of the rear and about 4,500 miles out of the front.  That's with progressive riding.  I like them, but like other similar tread pattern tyres, the tread develops 'cupping' so I tend to replace them when others might get a few more miles out of them.

I can't give an opinion on their off road capability, but they did get my W650 out of a glutinous muddy field on the Somerset Scatter  :D.
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Bike Preparation / Re: Class F
« Last post by Jason Potts on October 18, 2019, 07:06:54 pm »
Just looking at the pictures you posted of your GS project Paul. What tyre is that you got on there?

http://www.themotorcyclingclub.org.uk/forum/index.php?topic=71.45
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General Discussion / Re: Long Distance Trials Bikes We Like
« Last post by Jason Potts on October 18, 2019, 06:56:52 pm »
Think we are getting mixed up Steve. We were referring to the Kawasaki on Paul's link with the fat rear tyre and not the Honda pictured at the top of this thread.

I've reattached the link below

http://www.themotorcyclingclub.org.uk/forum/index.php?topic=286.0

Rather confusingly it says Yamaha on the tank. Hahahaha
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Exeter / MOVED: Class F
« Last post by David (tufty) White on October 18, 2019, 06:55:12 pm »
This topic has been moved to Bike Preparation.

http://www.themotorcyclingclub.org.uk/forum/index.php?topic=335.0

More to do with bikes than the Exeter Trial.
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Bike Preparation / Re: Honda SL230 and CRF230 Mods
« Last post by Jason Potts on October 18, 2019, 06:47:40 pm »
Quote
. If it was my bike I'd have the swinging arm professionally extended, or sell the SL and buy a Serow  :).

Yeh I'm going to look out for some 15mm aluminium block this weekend at the Stafford show. I'll do a post on here when I get round to doing the job.

I've tried a serow and I like the SL better. Just fits me better and the engine has more grunt. The SL is a long stroke engine having the same stroke as the XL250. Might even be the same crank?

There is a list of mods I'd like to do to make the bike feel better but that's just because I'm fussy.
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General Discussion / Re: Long Distance Trials Bikes We Like
« Last post by Stephen Bailey on October 18, 2019, 02:31:09 pm »
It is a kawasaki z400 twin. And I think it was his fist event.

Wonder if he still has the bike and if he's doing the LE again this year.

Interesting.... Its got Honda Badges on the side panels...….
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Bike Preparation / Re: Class F
« Last post by Paul K on October 18, 2019, 08:29:45 am »
However I can't find any information on tyres?

Is it the same as Class C? i.e. only TKC80 or Michelin T63 are allowed

Although I do find it strange the T63 is still included as it was deleted from the Michelin range in 2016!
All bike classes, A to E, are allowed to use any of the tyres mentioned in the SSR 2020.  The permitted tyres is always a work in progress and the rules are updated as practicality allows.  On occasions, a tyre has been submitted and approved just before an event and before there’s been a chance to update the SSR.

As the SSR state ‘The MCC wish the competitor to join in the spirit of the event by choosing tyres that are nonaggressive in appearance or destructive in use’.  Therefore, a competitor can submit any other tyre they feel meets the spirit of the SSR to the Motor Cycle Tyre Officer motorcycletyres@themotorcyclingclub.org.uk for that tyre to be assessed and possibly become an approved tyre.  The difficulty for the Club arises when determining dimensions of the tread spacing because they don’t always have access to the submitted tyre.  So if you’re going to submit a tyre that looks as if it might be on the cusp of acceptable, it’s worth getting hold of a manufacturer’s data sheet, or submitting a photograph with a ruler alongside the tread blocks.

The T63 tyre is still in the SSR because there is always the possibility that there is still some stock with dealers, or competitors have some stored in their garage for future use.  I believe tyres can be stored in a good environment for 5 years.  These discontinued tyres will eventually reach their best-by-date, whereupon they will disappear from the scene.

The position of Motor Cycle Tyre Officer is a volunteer position and the task of assessing tyres takes time.  There just may not be the time to devote to keeping up to speed with what tyres are currently available. So if anyone fancies taking on the position when the current officer moves on, please put your name forward.
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Bike Preparation / Re: Honda SL230 and CRF230 Mods
« Last post by Ian T on October 17, 2019, 08:41:11 pm »
I will see what I can do. I may not see the SL in question for some time but can ask for a photo.

If it was my bike I'd have the swinging arm professionally extended, or sell the SL and buy a Serow  :).

Thinking about it I can see why an open slot might be less desirable on a mono shock - presumably more leverage.
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General Discussion / Re: Long Distance Trials Bikes We Like
« Last post by Jason Potts on October 17, 2019, 07:36:29 pm »
It is a kawasaki z400 twin. And I think it was his fist event.

Wonder if he still has the bike and if he's doing the LE again this year.
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Bike Preparation / Re: Class F
« Last post by David (tufty) White on October 17, 2019, 07:32:45 pm »
I agree.

However, I think the purists would say it would make it too easy.

After seeing videos of the cars spinning up trying to get up sections, I can hardly go along with the argument that the motorcycle tyres like the Pirelli MT21 etc. are 'too agressive'.

It's rare the bike will spin up that much as that won't help you up a section.

I too believe a re-think is overdue.
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