Banjax/Dyno testing in general

Heckthusula · Borekit Bruiser Joined: 29 Jun 2006 Karma :

Hi, I'm new, so be gentle please!

Has anyone used Banjax MC's? Just wondering if anyone had any previous experience with them, as I plan to get jets fitted/shims etc with them.

I just had my bike dyno tested there because the acceleration has become jerky, the back wheel max hp was 43.78 - not bad I thought for an old Super Four, but I'm no closer to finding out what's making the thing jerk so much, aside from an old chain and sprockets and the mixture being apparently very weak on the idle circuit and very rich at full throttle (Variable depending on RPM, of course). If anyone has any ideas, I'd be grateful for your thoughts. I can post the Dyno chart if it comes to it.

Anyway, thanks in advance for any replies.

Heckthusula · Borekit Bruiser Joined: 29 Jun 2006 Karma :

Nobody?

Hmm..

colin1 · Captain Safety Joined: 17 Feb 2005 Karma :

if you have a lot of chain slack, that could cause a jerk after you give it power after changing gear
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stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

The name is hardly confidence inspiring Laughing

'banjax' is an Irish term for something that is destroyed beyond all useful function. So, say an artic reversed over the top of your bike with all 18 wheels, it could be said to be 'banjaxed'.

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Heckthusula · Borekit Bruiser Joined: 29 Jun 2006 Karma :

Ok then, time to dig deep for a chain and sprockets! Thanks for the advice guys Smile

True about the name Banjax(!) But they've been in business for donkeys years. They seemed a little disparaging of my bike's age though, with a kind of "Go away and have a think" attitude and the usual "This chain hasn't been lubed for 4 days, your oil is 1mm down on the dipstick, tut tut" talk. Think I'll go back to Pole Position on the New Kent Road (Whom I heartily recommend to Londoners) Their attitude is far and away more humble and customer service oriented.

Anyway, cheers again for reading.

edd · Nearly there... Joined: 06 Jul 2005 Karma :

knackered chain, sprockets, or cush drive could cause jerkiness at low speed, but under acceleration it sounds more likely to be a fuelling issue. You should change all the above if they are knackered anyway, but usually once the slack in the drivechain has been taken up it wont jerk Confused

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