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Post by thatsawkward on Jul 17, 2012 10:31:04 GMT 1
Hi folks This may sound a daft topic, but I'm considering raising a Revere by 3 or 4 inches. It's part of my "thinking" of my next project, so absolutely nothing concrete yet. In very simple terms, could I fit a longer shock on the rear and taller forks on the front and raise a Revere? Would probably involve replacing the rear sub-frame anyway for my other daft ideas (extra fuel tanks in panniers!), but as I'm not very technical minded I wondered what others thought of the potential of a raise like this? The outcome is intended to be a Revere Adventure bike, capable of long-haul on and off-road trips, with 500 miles between fuel-stops... Any thoughts, however far-out they may be, would be gratefully received!
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Post by realnutter on Jul 17, 2012 14:47:04 GMT 1
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gills
Bad ass biker
Posts: 262
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Post by gills on Jul 17, 2012 15:42:08 GMT 1
I think the biggest problem will be the angle for the UJ in the shaft drive. Small variations around the level position aren't a problem, but operating permanently at a bigger angle is likely to lead to premature failure. Not sure how you can get round the problem without some serious re-engineering.
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Post by De Graaf van Salland on Jul 17, 2012 18:28:05 GMT 1
I agree with gills. When the UJ is at a larger angle, the output end of the shaft will not have a constant rotation speed. 4 times per rotation it will accelerate and decelerate again. While keeping the same average rotation speed as the input side of the shaft.
This makes riding probably very uncomfortable and will also cause premature failure (as gills already stated).
GvS
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sear
Bad ass biker
Posts: 302
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Post by sear on Jul 17, 2012 18:56:08 GMT 1
If you balanced a taller rear shock with long forks you could make the UJ angle less extreme, as well as a slightly softer rear shock perhaps? In my opinion, you're far better off making something that is as light as possibly with suspension set up for variable terrain, but kept to standard height. If you stick a tall mudguard on, softer forks springs (Adjustable fork cartridges came on some CBR600s with the same diameter fork stanchion I think, and they might be persuaded to fit? so you could have on the go adjustability)
How much off roading are you seriously going to end up doing? Those tyres you have look spot on for unpaved roads, dirt tracks and stuff so that's probably the most that an NTV will be capable of without ruining its on road handling. you have to play to the strengths of what you've got and the ntv frame will never handle serious trails but if you're steady, dry and level dirt paths will be no problem.
unless you're planning on riding 80% dirt and 20% road (at which point I would suggest buying another bike) then just saving weight, putting a MX beak front mudguard on, and those tyres is the best way to go.
Too far in the dirt direction will leave you with a temperamental machine which is horrible on the road and not much better on serious trails.
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deedee
Bad ass biker
Posts: 338
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Post by deedee on Aug 23, 2012 6:27:01 GMT 1
A most intriguing idea...
Sears question; 'How much off roading are you seriously going to end up doing?' provokes thought. Mainly to do with all the issues involving the frame, but another thing that's forefront in my mind is;
The; 'Aluminium single sided swingarm' Coming down heavily now & again... Or just coming down onto it harder than design repetitively.
I can't imagine serious off roading; So it'd probably be unintentionally... But it does happen off road. Also metal fatigue? I don't know enough to comment, but got to be worth bearing in mind long term.
Here's my; 'far-out' thought on swing arm issue:- The Deauville double sided swing arm fits. (& the Deauville final drive is very slightly lower geared.)
Got to be worth chocking up front, unbolting shock & jacking under engine to check out U/J angle?
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peewit
Ahh! Just passed their bike test
Posts: 46
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Post by peewit on Aug 24, 2012 8:29:28 GMT 1
i like your thinking and anything can be achieved if you have the skills, patience and money. my only thought on what your doing is that raising a bike by 3 inches at both ends is a big rise. if you reduced that to an inch and a half i think you would be quite suprised. hope it works well for you
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ssray
All Weather Rider, well hard
Posts: 158
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Post by ssray on Oct 1, 2012 8:41:59 GMT 1
I was thinking of a shaft drive transalp the other day, as winter transport-then for summer put 17`s on and I`d be back where i started!!!
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norfolknchance
Sheene Gold rider. Nuff said
15967 mile & climbing
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Post by norfolknchance on Oct 1, 2012 23:13:43 GMT 1
my thought is the balance having used "fingers" off road in standard trim..............its a heavy machine for off road use
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deedee
Bad ass biker
Posts: 338
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Post by deedee on Feb 9, 2013 17:25:20 GMT 1
Your idea intrigued me enough; that I just had to have a little play. Chocked up front, unbolted shock & jacked up to check U/J angle; but don't think I got a 3-4 inch raise from her rear end. (No pun.) The swingarm fouls on a frame tube cross member above the U/J. (Rise height unknown as shock fitted isn't stock to compare with.) U/J angle change not too dramatic. (Any more than designed for?) However, I thought; 'Why not?' (& as I needed to replce the fork staunchions on my restoration...) I rebuilt forks to raise front end; My original project forks were swapped for the bent restorations & using the lower legs with longer staunchions; I raised front end. I'll replace the rear shock with one slightly longer, 'if' one comes up, but the project bike is genrally on the back burner until time (& the funds.) allows; life & restoring Stevey's Revere have got in the way. Allowing for the built in compromises of anything mass produced... I'll bet my U/J on it's tolerance being the frame tube cross member! On that note; Where can I source that Deauville rear end from? lol.
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norfolknchance
Sheene Gold rider. Nuff said
15967 mile & climbing
Posts: 782
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Post by norfolknchance on Feb 10, 2013 18:28:47 GMT 1
you pinched my front mudguard............
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Post by thatsawkward on Feb 10, 2013 19:38:52 GMT 1
Nicely done deedee!! I do the look of that - not sure about the handling but who cares when it looks that cool!!
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deedee
Bad ass biker
Posts: 338
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Post by deedee on Feb 10, 2013 23:48:05 GMT 1
Totally true Norfolk... But in my defence I did send thanks to; 'Norfolk & his Fingers', in my post when I added the mudguards. (Planned to get ally, but used tyres for photos, & liked them!)
Quick brain pick from your good self Norfolk, if you don't mind; I've looked over a few Deauville's since Thatsawkward's query... In your experienced opinion; am I correct in my belief that: - The Deauville swingarm, (& shock.) will fit in the Revere frame? I accept that the exhaust would need to be replaced... ('IF'!)
Not done yet Thatsawkward; she raised more than expected! Thinking is; Bros yoke & clip-ons will adjust front ride height. But as said; 'the project bike is genrally on the back burner'. If I get time; I'll look at fettling a top shock mount for rear, (Stock & high.) save me watching out for a suitable shock...
And with regard to her handling: - Well; she's a real b*tch to fight in & out of the shed now, (Be worth fitting the Bros yoke etc. just to sort that out!) too long for original spot & leans over far on side stand.
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norfolknchance
Sheene Gold rider. Nuff said
15967 mile & climbing
Posts: 782
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Post by norfolknchance on Feb 11, 2013 17:30:17 GMT 1
not sure if they will........ i can measure the frame up & compare sizes if needed have been told the rear shocks are not interchangable
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deedee
Bad ass biker
Posts: 338
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Post by deedee on Feb 12, 2013 0:17:16 GMT 1
I've not seen the top end of a Deauville's rear shock mounting. But I do know that the bottom ends have very different fittings! Images I've looked at on the bay; the tops do look very similar? you can see mounting bracket on the swingarms are different. I'd reckon on changing both the swing arm AND the rear shock.
Anyway, it's just; 'blue sky' at the moment... But who knows?
Looking at bare Deauville frames on the bay; Shock sited similar to the Revere. (Size too?) The query was curiosity if you knew off hand; thanks for offer though:- I can visit a breakers at some point & check... It might even entice me! Watch this space, lol!
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