17 Inch wheels

BOT

Junior member
Location
Luxemburg
Good day,
how about 17 inch wheels in the before 1989 three cylinder and twin Laverda´s, are they used a lot, maybe for racing bikes or for road use.
How much interest is there in it and what are the pros and cons.
Many thanks in advance.
 
Good day,
how about 17 inch wheels in the before 1989 three cylinder and twin Laverda´s, are they used a lot, maybe for racing bikes or for road use.
How much interest is there in it and what are the pros and cons.
Many thanks in advance.
A decent rider needs to lift the engine in the frame to avoid it hitting the tarmac and you'd want to lower it?

Paul
 
I have had 17" on my SF2 for decades, 120 front and 150 rear tyres. When fitted it was almost impossible to get good 18" rubber which is no longer the case. I have Dunlop RoadSmart on them, bloody excellent. I have longer rear dampers and the forks dropped a bit in the clamps, as such the centre stand has the rear about the same off the ground as it had with the 18s, but I run two teeth less (38) rear sprocket. The contact patch is further out so cornering clearance isn't a problem with my headers bent up a bit and no exhaust junction box. I have never scraped it and tend to ride fairly quick in the corners (too bloody quick last time, when I slid off in a tight corner). It steers quicker but still doesn't need a steering damper. Numerous people have ridden it and say it is great.
 
Made in Italy have been trying to flog a SF750 twin ‘racer’ with 17” wheels for ages. Not really sure what the benefit is in going down that route, but if anyone can convince me there are some I may well give it a try too.
 
There is a bloke in Canada who ran a big bevel website for ages who had a very nice bevel that ran 17-inch wheels, In my opinion, those wheels just looked wrong as it could get. Tippie can you wack a pic of your twin up, I would love to see if it's got similar proportions to that Bevel. It had really long forks with THOSE wheels and didn't carry it well at all.
 
There is a bloke in Canada who ran a big bevel website for ages who had a very nice bevel that ran 17-inch wheels, In my opinion, those wheels just looked wrong as it could get. Tippie can you wack a pic of your twin up, I would love to see if it's got similar proportions to that Bevel. It had really long forks with THOSE wheels and didn't carry it well at all.
Hi Vince

likely my buddy Rene Waters. Photos here http://www.renewaters.ca/twenty12/index.htm I can outrun that bike on any one of my three Laverda triples......:cool: ;) the bike is very non stock, uses a lot of modern parts including front end and rear suspension

he was pretty quick on a very pretty 60's Ducati 250 at the Moto Giro in Nakusp, British Columbia a few weeks ago.
 
There is a bloke in Canada who ran a big bevel website for ages who had a very nice bevel that ran 17-inch wheels, In my opinion, those wheels just looked wrong as it could get. Tippie can you wack a pic of your twin up, I would love to see if it's got similar proportions to that Bevel. It had really long forks with THOSE wheels and didn't carry it well at all.
 

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Bike has a quite modern stance, Lee! Quite convinced it works just fine.

A friend fitted moderately wide 17 inchers to his 750 SFC "replica" build, together with USD forks and big brakes. Proportions were way off, despite it being a very pretty and well put together bike that tracked nicely. He eventually went back to 18", purely for the esthetics. Rode just as nice on those too.

piet
 
The big gap over the rear is a bit eye-catching but the front looks ok. Here is me being picky when my 3c is far from a busty queen, great spell check change, it's supposed to say Beauty Queen. It's performance first for me.
 
Hi Bot.

You can buy a SFC 1000 proto type :unsure: ;):)

Br Peder
That was even a 16" if my memory serves me well... ;)

In theorie, a larger diameter brings more stability at higher speeds, a smaller diameter is better for turning. Truth is, that overall mass and profile of the tire does play much more into this than the 1" in diameter I would say...:

recommended by Piet some years ago, I changed the rims of my Jota from 18" cast wheels to 18" GSX-R1100 wheels and put BT012SS tires on it that have a V-Shape. That together with the much lighter (though bigger in diameter) brake disks from - I think - a Kawa transformed the bike into almost a flicker... Many have ridden this bike and experienced the difference to their standard bike and were amazed of it's handling. It feels much, much lighter than it really is and is very controllable and stabil.

Meanwhile, the 012SS is not available, so I had to replace it with something similar (BT016?), which gives similarly good handling. I have ridden that combination also on the Track of Spa (see my avatar) where I touched ground with the alternator cover on the 180° right turn (turn 8, Bruxelles). I am heavy and not the best rider, but this combination gives a lot, lot confidence in the bike that I did not have with the original rims and the - at that time "best in class" Metzeler ME tires... Though much wider (150 compared to 130), the handling is so much improved, I could not believe it until I went back to a standard bike years later again for a test ride...
Same on the 1000SFC: I bought 2 1000 SFC in a package some years ago and restored the black "Classic". That bike was original suspension wise (except for the improved fork) and had modern Conti-Tires on it. It did not compare well in terms of handling with my 1000 SFC which has GSX-R-rims, too...
 
There is a bloke in Canada who ran a big bevel website for ages who had a very nice bevel that ran 17-inch wheels, In my opinion, those wheels just looked wrong as it could get. Tippie can you wack a pic of your twin up, I would love to see if it's got similar proportions to that Bevel. It had really long forks with THOSE wheels and didn't carry it well at all.
Rear dampers are 370mm, quite a bit longer than std, my preference together with "Jota" triple clamps / parallel and 20mm less offset than std clamps.
Much of the steering feel comes from the suspension (your favourite 👹), hard unforgiving suspension makes any bike steer (handle) far from optimal.
 
This the bike Vince & Paul ?
His web site is still up , but he has stepped back from admin [for want of a better word]


View attachment 66792
yes, that is the bike built by Rene Waters. Rene and Sue have retired to a very small community in rural British Columbia not far from Kaslo British Columbia. His garage/shop is bevel Ducati central and the road in to their place is roughly 30 kms of some of the best twisty road in western Canada........ I'll ask Rene if I can post some bike photos I took at his place a few weeks ago
 
The big gap over the rear is a bit eye-catching but the front looks ok. Here is me being picky when my 3c is far from a busty queen, great spell check change, it's supposed to say Beauty Queen. It's performance first for me.
GEEZZZ!! Busty Queen works for me!! LOL!
 
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