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BOOM!=BAD! VERY bad. This can not be stressed enough. Be careful mounting that sucker.



Other'n that, welcome to The Dark Side.
 

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Have fun and keep us posted!



After some of the mud pics you have posted, I expect you'll like that tire!



I am contemplating the same thing, but need the DOT legal Maxxis. . .



Ride On, Bag
 

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Discussion Starter #4
Straight down to work, first thing, sensible tyre off and compare it to crazy tyre....Yep, looks pretty stupid!!








New tyre went on the rim much easier than expected, just used some small levers, lots of lube and 60psi to seat it.......looks ridiculous...


(you can see the monster front that I fitted last week that got me rolling into this adventure.







Tyre to swinging arm clearance??? um, none, time to get chopping!!!! I'd better look back over the old posts and find out what I need. Was it +2" extension, longer shock, bigger sprocket, etc ????.....







I've got the arm out and I'm off down to the chop shop after dinner, wish I washed the bike before I got started, duh!!!
 

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"New tyre went on the rim much easier than expected, just used some small levers, lots of lube and 60psi to seat it......."

"Tyre to swinging arm clearance??? um, none, time to get chopping!!!!"



Thank you for being so thorough. This is exactly the sort of info that should accompany an ATV tire thread.



Add the Carlisle to the list of tires which seat at less-than-lethal pressures.



How's chain and chainguard clearance?



2" should be adequate. Beyond that you start to affect handling significantly, which is either a good or bad thing, depending on your riding. If it's mostly mud I suspect you'll want to keep it short.



I destroyed my Bighorn by not lengthening the swingarm. An embarassingly small rock found itself wedged between the tread face and the crotch of the swingarm, tearing the middle lugs from the tire 10 minutes into the first ride. While you can squeak by if you just lengthen the chain and set the axle back, it's a real crud catcher. Yours is definitely the right approach.



You can recalculate your rear sproceket by plugging the ACTUAL total mounted diameter of the ATV tire into the calculator in polace of the stock tire's info.



I added a couple of teeth to compensate for the added rolling resistence, but others have not and are perfectly happy.
 

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Discussion Starter #6
Chain guard clearance is 'generous'. Which is nice because it is one less thing to chop up.

I remembered your tyre ripping story Lizrdbrth when I was calculating the risk of just a longer chain.


It took me about five seconds to decide to go all the way and stretch the swinging arm.




The new tyre has got a much greater rolling circumference which will effect the gearing, I'll probably take a wild arsed guess and go for 55.

Also it is much heavier which will probably overload the already pitiful rear shock, some thought needed here.



Here's where I am tonight:







I'll weld it up tomorrow.



Bagger, do the police check your tyre approval?

This Carlise states 'not for highway use' which I'll grind off.

On most occasions our police will look at what it does say, not what it doesn't....i.e, if it doesn't have a DOT mark they don't seem to worry too much (unless you've just run someone over)
 

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Are you going to put some tubing inside for reinforcement? Unfortunately the pictures are gone, but in this post Ronnydog tells what he used inside. 3/16" wall tubing is probably overkill for most people, but going with tubing inside will back up your welds so there is less chance of burning through, and of course will make the swingarm much stronger and straighter.
 

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Hi

good idea but I think it would be wiser to put a longer swingarm

please keep up informed

cheers
 

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Hi

good idea but I think it would be wiser to put a longer swingarm

please keep up informed

cheers


Long swingarms put a ton more weight over the front end. Desirable on the street, but creating a lot of work for the offroad rider. About the only place where they shine offroad is in near-vertical hillclimbs.
 

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Discussion Starter #10
I think Mame means it would be safer to use a one piece construction?

So anyway, here's how it went down in the workshop yesterday morning.....

I quickly jigged up the extensions......







tacked them in place.....







Welded all round....notice the blow hole where I got a bit carried away!!!......







Added some external bracing....







and replaced one of the chain guard mounts..







More to follow..
 

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Discussion Starter #11
also lengthened the brake arm....







Check out my 'lizdbrth rock vs. tyre clearance' now....







I decided not to grind the welds off. Normally I would polish them smooth but they aid the strength of the join.







I'm itching to try it out on my standard sprocket sizes but I'm waiting for a temporary chain extension and some joining links to arrive by post.

The extra rolling circumference means I will need a one off 57 tooth sprocket machined and 140+ link chain......

Just moving the bike about in the garage I can feel the huge weight increase, not good
going to miss the lightweight nature of the TW.

I'm expecting the already weak standard rear shock to be completely overloaded by the massive increase in un-sprung weight.

Test rides next!!!!!
 

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Nice job there Slyfox.



Something to consider, when the BMW boys lengthen swingarms it increases the wheel travel, (suspension travel, that's why they do it).

Be careful your tyre doesn't touch on full compression.



Whats that Clarke mig like. I am thinking of getting one because my Murex is not very portable.
 

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You da man!
 

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Discussion Starter #14
Nice job there Slyfox.



Something to consider, when the BMW boys lengthen swingarms it increases the wheel travel, (suspension travel, that's why they do it).

Be careful your tyre doesn't touch on full compression.



Whats that Clarke mig like. I am thinking of getting one because my Murex is not very portable.
Lengthening the arm has increased the clearance between the seat and the top of the tyre but of course will increase the leverage.

I'm expecting the rear shock to need some love and attention, it was dire with a standard arm and tyre.

The Clarke welder is good. It was cheap and it works well.

I'm feeling very happy just now because I've been dreaming about doing this mod since I first saw it on this forum last year.


By the way, i'll send you some metal if you want?
 

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I thought "sly fox" was just a clever name, but you've proven that it's well deserved. Very nicely done, and I'll bet that TW will go places the stock TW never dreamed of.



On a side note, I'm glad we don't have those HUGE license plates where I live, or I'd be constantly having to look for mine in the trail, and trying to repair it and get it back on the bike, lol.
 

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Discussion Starter #16
I thought "sly fox" was just a clever name, but you've proven that it's well deserved. Very nicely done, and I'll bet that TW will go places the stock TW never dreamed of.



On a side note, I'm glad we don't have those HUGE license plates where I live, or I'd be constantly having to look for mine in the trail, and trying to repair it and get it back on the bike, lol.


Thank you Rodney.

Yes, the UK big number plate is really horrible and ruins a bikes styling at the rear. I wish we had cool plates like in the US, Oz and Japan.

Funny thing is, the Police wouldn't be too bothered about how legitimate my tyre was but they would give my a ticket if I had a 'little plate'.

It's all to do with the Advanced Numberplate Recognition System that some patrol cars have. It means they can check our insurance, MOT, licence and links to crime without stopping us.

Also it makes it easy for Speed Cameras to get us.

I not really a naughty boy in public so I don't have much to worry about but they catch a lot of people who should not be on the road.
 

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How tall is that tire (tyre)?
 

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Discussion Starter #18
How tall is that tire (tyre)?
The standard Vee Rubber was 24" and the Carlise is 27"

A nice man called Chaz at B&C Express (Renthal) worked out that I need a 57 tooth sprocket if I want to keep the current gear ratio.

Of course, nobody makes a steel 57T so they are making an alloy one for a about $28.

In the mean time I've put in an extra piece of chain so I can test it out....







The result looks insane and will take some getting used to, on and off road.....



 

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Nice Job Slyfox. You got me thinking about a winter project now....
 

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I decided not to grind the welds off. Normally I would polish them smooth but they aid the strength of the join.


That's probably wise considering you ride off-road. When I attempted to chop and extend my swing arm using the exact method you used, I tried to grind the welds smooth. It didn't work out cosmetically to my liking, and given the thin wall dimensions of the swingarm likely weakened the weld sites as well. I went through a weld, grind, curse, weld, grind, curse routine until I threw in the towel.



Great job on the extension and fitting of the tire. It looks very mean.



Are you rivet-linking your chain extension or using clips?
 
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