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Old 09-25-2007, 08:23 AM   #21
04RSVR
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The two aprilias had the same gearing. My bike is completely stock. I think the smr450 had one gear to go in the morning and I was in top gear at the end of the back straights. He changed his rear sprocket and then we were closer in gearing but it didn't make much difference in acceleration. No idea what the CRF was running.
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Old 09-25-2007, 10:00 AM   #22
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Quote:
Originally Posted by 04RSVR View Post
The two aprilias had the same gearing. My bike is completely stock. I think the smr450 had one gear to go in the morning and I was in top gear at the end of the back straights. He changed his rear sprocket and then we were closer in gearing but it didn't make much difference in acceleration. No idea what the CRF was running.
Well you do realize that as far as your speed goes in the straights the size of the front and rear sprockets can make all the difference. It's pretty difficult making a comparison speed wise if your comparing apples and oranges.

I truely do and I'm sure everyone else also appreciates your input on the bikes because it is valuable, but trying to say one was faster here or there may not be a valid point although I'm sure it is what you experienced. I just wouldn't want someone considering buying a SM to make they're decision based on which one seems to be faster. These bikes can all be set up a number of diffent ways depending on the purpose you want. For instance right at this moment my supermoto'd XR650R will do almost 140mph on the rode. I kind of doubt your getting that kind of speed on the track and if I had it on the track I'd probably gear it so that it wouldn't go that fast at top speed either.

Just some fair input. Not meant to be abraisive.
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Old 09-25-2007, 10:12 AM   #23
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Originally Posted by Pre-K View Post
So I'm in the market for a new bike now...

Mini supermoto is fun, so I was wondering how cool a full size one would be for the street/track... The Aprilia seems the nicest.

Supposedly, the Suzi is underpowered for the street, but its cheap(er).

Thoughts? Other suggestions?

Other sugestions
http://www.bosshoss.net/Default.asp

or a

http://www.seriouswheels.com/cars/to...wk-Concept.htm
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Old 09-25-2007, 10:55 AM   #24
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Quote:
Originally Posted by XRCajun View Post
Well you do realize that as far as your speed goes in the straights the size of the front and rear sprockets can make all the difference. It's pretty difficult making a comparison speed wise if your comparing apples and oranges.

I truely do and I'm sure everyone else also appreciates your input on the bikes because it is valuable, but trying to say one was faster here or there may not be a valid point although I'm sure it is what you experienced. I just wouldn't want someone considering buying a SM to make they're decision based on which one seems to be faster. These bikes can all be set up a number of diffent ways depending on the purpose you want. For instance right at this moment my supermoto'd XR650R will do almost 140mph on the rode. I kind of doubt your getting that kind of speed on the track and if I had it on the track I'd probably gear it so that it wouldn't go that fast at top speed either.

Just some fair input. Not meant to be abraisive.
For clarification. My comparisons on speed were on the back straight at MSR-H. I left turning out of the equation because that is much more rider skill than bike performance in this case (besides, we all know Larry is faster). I'm just trying to say that for me, the SXV5.5 is worth the effort. When I rode the SXV4.5 I immediately missed mine. After Larry rode mine, once he had his 450, he said "I want your motor". I am lucky that my bike is geared very well for my favorite track in stock form. On the SXV 450 I was running out of steam around 90, on my 550 I'm hitting the limiter around 118 on the same straight.

It's the best example of performance I can give when comparing motards. The weights are close and I don't have enough experience to compare handling. IMO, that can be changed most significantly by tires and the other three had better tires than I did. My stock dunlops are going to come off soon.

How is this, get anything else and you'll spend more to try and match the performace of the Aprilia. But, the Aprilia does have it's issues.
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Old 09-25-2007, 12:49 PM   #25
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Here's a sweet little potential project for a Aprilia 450/550...
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Old 09-25-2007, 03:28 PM   #26
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i am running 15-40 gearing at MSR-H. on the back straight before the sweeper i am hitting just shy of 9500rpm...which according to gearing should be around 95-100 mph (i don't have a tach). my crf dyno'ed a sliver under 44hp at the rear wheel on an FP mustang dyno with this gearing. granted this is with my slow riding it on my second trackday with the bike. ymmv
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