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Old 11-11-2007, 08:51 PM   #1
psychsurf OP
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SV650 ADV info thread

Ok, I know that there are quite a few threads with information and a couple examples of SV650s that have been built up for more off-road purposes. Every time something new, or even something old, pops up with a off-road SV on it, there are lots of SV lovers (myself included) who want more information. The information there is available currently is extremely scattered and fragmented, and I thought it would be a good idea to make a thread dedicated to what is known and what is possible. I've looked into this a LOT, and there definitely isn't an all-in-one thread on the subject anywhere.

I'm hoping this will be a source of inspiration and go the direction of the "twin sport 500" thread, where people are experimenting and innovating and sharing new fixes. Of course, it would be nice if people would finish those projects they started, but anyway... Ultimately, it would be great if a working parts list was created here for a more dirt-capable SV. I know I'd love to see that. If nothing else, however, I'd like to see people contribute what they already know so we can have it all in one easily referenced thread.


So, what do I know?

Forks: 41mm

2008 klr has 41mm forks
CRF 450 does too
KX250
XT600 forks are 41mm, but they taper down below upper triple
Possibly use tripleclamps and forks from DL 650/1000?

Rear shock:
Here's a thread on svrider that gives myriad different options for shock swap on the SV650: http://forum.svrider.com/showthread.php?t=45179


Rear wheel:
Hub from a F650 axle spacing/sprocket almost perfect, need wheel offset adjusted.
Almost every dirted sv photo I've seen has rear spokes, so there must be other easy solutions

I re-hosted the photos I used at tinypic so they wouldn't be lost to the sands of time. If anyone took any of these photos and would rather I didn't use them this way, just let me know.

First one, the infamous yellow SV650 Enduro, by Gaspare Momesso

Contrary to myth, it was a one-off, and any allegations of him selling kits were due to his trying to sell, as a kit, the conversion parts to this one-off. God, I wonder where that stuff ended up?!

I found a quoted email by him, giving the only clue to parts list...
Quote:
SV650 Off Road in Actions during Italian Baja last month. Rider Gaspare Momesso. Also i am going to sell the entire kit for enduro : $ 1900
This kit include the following parts:

Front wheels complete of disk brake and special axel ( 21 inch )
Front fork Marzocchi Magnum 45 (tr.TU Gold)
Home made aluminum alloy triple clamp ( very expensive labor )
Brake system complete ( Nissing )
Rear Shock Absorber with spring
Rear brake system complete of aluminum brake support ( home made )
Rear wheels complete of disk brake and special axel and rear sprocket spacer ( 18 inch )
Left and right footpad with aluminum support and links ( very expensive labor )
Aluminum seat support
Aluminum battery support including special extra light powerful battery (KTM Yuasa )
Seat and rear fender ( Husaberg )
Front and rear sprockets ( 14 / 50 ) including Regina gold OR chain 420
2 link for rear arm
Chain guard
Carbonium/Kevlar Gas tank ( 7.5 liters )
Carbonium Silencer ( very loud )
Hand Guard and front light
Skid Plate
All of the above is used and was installed on the SV 650 in the Pictures.








Next, Aussie SV650 enduro. Not as polished as the yellow one, but it's being ridden!

Info found here:
Quote:
A crashed SV, Kawa KX250 forks, a custom long Ohlins shock and various other stuff, cant fit a 21" front wheel due to the SV steering geom and the radiator etc, he has plans to cut the steering head off and change the angle. I havent ridden it but my friend who has says it's pretty evil due to the wheels and steering geometry, shakes it's head seriously. However the guy who owns it (Norm Watts) rides it real FAST through anything, he's about 60 and is an ex Aussie enduro champ and his son is Shane Watts (world enduro champ) so as they say it's not the bike it's the rider. The bike he had before this one was a TRX850 done out the same way




The SV650 Supermoto by eyedragaknee

It fits in because its really only a bigger front wheel and some dirt tires away from working... Well, maybe it needs to have some mud rubbed on it as well.

I PMed to ask about it, and here's what I got.

Quote:
The rear hub is from an F650 BMW and the axle and sprocket spacing and everything are almost a perfect match for the SV. You just need to build the wheel offset correctly. Jeff at Eastcoast wheels built those for me and probably still has specs on them.

I think you could run a 19" front tire and be OK from what I remember. I ran a longer rear shock from maybe a GSXR 750? Can't remember for sure.

Front was a Cannondale supermoto fork set. A CRF450 is the same fork tube diameter, so a CRF set would work as far as bearings and stack height for the triples. I sold the whole fork setup to a guy that bolted it into his CRF450.

You might have to scrap around for the right tapered bearings, but I remember that was easy and off the shelf I think.

Hope that helps.

It handled pretty good and was fun as hell for sure.






Finally, and most recently, Amazing Ricardo's frankenSV from the "burning liberal festival 2007" thread.

All I know about this one is what can see in pictures. I PMed Amazing Ricardo, but no response yet. Looks like he's been away for a while. Hopefully he'll get back here with some solid parts info and riding impressions.

I blew up and cropped the pics for bike detail.







Ok, phew... That's the info I have on the subject, as complete as I can recal. As I said at the start, hopefully this will help and inspire others. I really hope it will inspire more folks to chime in with helpful information!

For example, what are some more 41mm forks that might bolt right in, especially ones that have the axle at the centerline of the fork rather than in front, so trail doesn't get screwed up? What about options for raising the rear, moving the pegs forward, putting a spoked hub in the swingarm, etc...?

psychsurf screwed with this post 11-11-2007 at 09:28 PM
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Old 11-12-2007, 12:45 PM   #2
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I've gotta bump this because I find it so interesting. I just sold my SV, and will probably replace it with a Wee Strom in the Spring, because I don't have what it takes to make those mods myself.
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Old 11-12-2007, 02:22 PM   #3
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I have a very big interest in this also. I love my '01 SV and a project like this would be sweet!

BTW, I have better pictures of that last one



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Old 11-12-2007, 02:28 PM   #4
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I love the SV650K6 it was my first, now i'm putting miles on my DL650K7. I'd love to do a SV dirtbike setup when i get the time and the SV gets a bit older, its still just a little too pretty.

My biggest fear would be breaking the radiator, my ideas for protecting it would be checking out the stunter sites and see what they do.
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Old 11-12-2007, 03:35 PM   #5
psychsurf OP
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Killer pics, bluelightning! Do you have any more information about the setup? Or did you pull those from a thread that had more info?
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Old 11-12-2007, 04:03 PM   #6
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Quote:
Originally Posted by psychsurf
Killer pics, bluelightning! Do you have any more information about the setup? Or did you pull those from a thread that had more info?
I pulled them from a thread awhile back. I never kept any of the info, sorry.
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Old 11-12-2007, 03:59 PM   #7
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Having taken my SV on a few minor dirt roads and intending to do more, this thread certainly sparked my interest :) I've got a 2004 SV, so I suppose slightly different to all the ones posted here (which are the earlier carb ones).

Does frankenSV have a 17" front wheel? If so, what tyre is that?

I've also noticed a distinct lack of fall-over protection (apart from the frame slider on frankenSV), how do people address the radiator-sticking-out-the-side issue? I've got frame sliders, but am not totally convinced they provide much protection off hard bitumen. The bike has gone over on bitumen and the slider seems to work... I've looked at the H&B engine guards but from the pictures in the installation instructions (I haven't been able to find proper pictures of them) they don't look like they would do much more than the frame sliders, and well, they're significantly more expensive than frame sliders so I haven't gone down that path.

I've also looked into hand guards, the DL ones look the best IMHO but they're all-plastic and don't seem to hold up all that well to falling over. Or at least, my housemate managed to break his levers on his Wee even with the handguards... He also broke the handguard.

Bashplate, does anyone have any closer pics of how it is mounted?
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Old 11-12-2007, 04:13 PM   #8
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Quote:
Originally Posted by demuire
I've also noticed a distinct lack of fall-over protection (apart from the frame slider on frankenSV), how do people address the radiator-sticking-out-the-side issue?
I have a friend who used to roadrace a HawkGT, and he mounted his radiator 90 degrees off (so it was taller than wider) so it wouldn't get damaged when he crashed (often). Kind of like how the latest japanese cruisers do.

I am also watching this thread, because I've always wanted to Adventurize a Hawk.
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Old 11-16-2007, 07:39 AM   #9
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I used to own an SV and travelled a short way down this road too.

So, what do I know?

Forks: 41mm

2008 klr has 41mm forks
CRF 450 does too
KX250
XT600 forks are 41mm, but they taper down below upper triple
Possibly use tripleclamps and forks from DL 650/1000?



Ah, the CRF and the KX do NOT use 41mm forks. Depending on the year (of KX) they vary from 41mm to 48mm upside down type forks. (I believe the CRFs started with a 43mm upside down fork.) What may be happening is there being some confusion about the size of the steering head bearings, so that the triple clamps may bolt right up. There is surprising commonality between steering head bearing sets from one manufacturer to another. Another thing to watch when shopping for a donor is the length of the steering head itself. If the length is correct or almost the same you can shim them or a bearing supplier can substitute the bearings by way of inside and outside diameter with equaling size and pitch.

BTW. As to your list of possible donor forks, you might want to add the HD 1200R Sportster. It used a 41 mm right side up fork with a twin rotor braking system and spoke wheels. The forks were actually quite good, if limited in travel.

But, for a "dirt" bike of this size and weight a 41mm fork is too small and will give you too much front end flex. I'd look more toward a heavier duty front end, like maybe from a DRZ400 or a XR650R donor, including triple clamps.

I wonder if the stunters know about the SV's front cylinder oil starvation problem during wheelies? Guess they have to learn quickly!

Actually that problem was solved on the newer model SV's by relocating the oil pick up tube. It only affected the earlier models. Which leads me to my other .02 point. I would suggest staying with the earlier models because of the carb vs FI. For this application I think having carbs gives you more flexibility and has less electronic junk that can get in the way of your goal. FI and all the computer stuff seems to me to limit your options. Plus, the tubular frame looks so much better than the cast one. The only other thing to watch out for with the earler SVs is the cam chain tensioner. Some of the early bikes had problems with them, so watch out for this if shopping for a donor bike.

Good luck. In the end I gave up due to limited funds and tools and just bought a strom. But, truthfully, I think the SV is a better bike.


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Old 12-05-2012, 10:13 PM   #10
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Quote:
Originally Posted by psychsurf View Post
XT600 forks are 41mm, but they taper down below upper triple
great idea to compile info, pscyhsurf. this is a very late reply but i just picked up a pair of XT600 forks from an 80s model and there is no tapering, just 41mm the length of the stancheons. this will help as there is a fair bit of adjustment possible before the forks hit the handlebars. possibly the tapering forks are from a later model xt600? i heard they changed in the 1990s...

these should be a great fit and just slide into the SV triple clamps so no messing around with steering locks, instrumentation etc.

i'll need to confirm but it looks as though the stock SV650 axle will work in the XT forks which would be a bonus.

there are various suzuki 1000cc front discs that are 320mm and will bolt on the SV hub, so all i'll need to do is grab one of those then a complete front brake caliper, brake line and lever etc and rig up a caliper adapter plate to space it correctly for the larger disc.

the front should go up by three inches or so for extra clearance, which should balance out nicely will the 90s model ZXR rear shock which is an inch longer than the SV650 so should kick the rear up about the same amount. or just get a set of dog bones that will kick up the rear instead.

at this stage will just fit a high profile front tyre to take it a bit closer to the diameter of a 19" front wheel. but i do have an old RM250 21 inch one lying around. this has the same 20mm axle as the SV650 so shouldn't be tricky to fit.

and some preliminary measurements show a honda transalp rear wheel could be easily adapted (and i can get one for just $100). the only tricky bit looks to be the rear disc is too big for the SV650 but the transalp has the same disc bolt hole pattern as an XR400 rear disc which is 220mm like the SV. too easy!

just thought i'd mention this in case anyone is looking at spoked wheels. if so, other 21" front wheels with a 20mm axle diameter are the WR250F, WR450F, YZ250F, YZ450F and early RM250s. all have the same bolt hole pattern and the cheap way to put a bigger disc on is the 310mm DRZ400SM front disc with the correct bolt hole pattern, and under $150 new on Fleabay.

it would be interesting to get hold of a wrecked transalp actually. the forks would slide straight in, you'd still have twin discs up front....
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Old 01-06-2013, 10:46 PM   #11
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Quote:
Originally Posted by B1 View Post
i just picked up a pair of XT600 forks from an 80s model and there is no tapering, just 41mm the length of the stancheons. this will help as there is a fair bit of adjustment possible before the forks hit the handlebars......
i'll need to confirm but it looks as though the stock SV650 axle will work in the XT forks which would be a bonus. .
just an update. definitely no tapering of the XT600 forks and they just slid into the SV triple clamps. but the stock SV650 axle did NOT work in the XT forks so just rummaged through a box of axles at the wreckers till i found something that worked.

i did a write up here if anyone is interested in what i'd call an intermediate build, just enough to make the SV650 a reasonable adventure bike but you'd want to avoid anything harder than dirt roads in reasonable condition.



i don't think it's been mentioned on this thread, but there's a handy chart here comparing all the specs of rear shocks that are apparently suited to the SV650.

and another one here by ohlins. useful if you want to try and find a rear shock with similar length but more stroke to get longer travel on the rear. it covers dirt bikes and road bikes.


OTHER ADVENTURE SV650 BUILDS

just click on the pics below to go to the relevant build threads...
























B1 screwed with this post 01-26-2013 at 09:54 PM Reason: added a pic
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