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-   SV Talk, Tuning & Tweaking (http://forums.sv650.org/forumdisplay.php?f=111)
-   -   SK5 - Query re top speed and restriction (http://forums.sv650.org/showthread.php?t=148570)

yorkie_chris 21-03-10 07:03 PM
Re: SK5 - Query re top speed and restriction
 
Quote:
Originally Posted by MattCollins (Post 2218624)
Something that has had me wondering is the difference between the restricted and unrestricted ECUs and how Suzuki restricts the SV.
At a glance restriction via the secondary throttle (SDTV?) map might seem the logical choice, but perhaps that would be too easy.

Has anyone with a restricted bike messed with this? ie disabling SDTV.
Surely it would still be mapped to deliver the correct fuel for say half open SDTV so even if you wired the SDTV full open or removed the butterflies it would run lean as hell?

simesb 21-03-10 07:05 PM
Re: SK5 - Query re top speed and restriction
 
Quote:
Originally Posted by barwel1992 (Post 2218727)
ok was on royners and the fiche shows the modle number for my bike but cant find it on the ecu at all :/
My bad - I gave the part no.

think MGT060 is on the full power, and MGT061 on the restricted.

Dizeee 21-03-10 07:14 PM
Re: SK5 - Query re top speed and restriction
 
Quote:
Originally Posted by TazDaz (Post 2218430)
Definitive way is to see if you have decent pulling power between 7k and 9k rpm. If its restricted the revs take longer to get there as at about 6k the rate of rev increase slows, where as full power lets it rev more freely.

Try and get to 10k rpm in 2nd or 3rd. If you can it is not restricted.
I have torque low down and as the revs rise the bike accelerates quicker and quicker. I can add 30 mph on to my speed at 40mph in a couple of seconds at high revs (7k and above).

I have been out today on the bike all day with a friend who has an identical bike - 05 SK5. I was chatting about this with him and we were both describing our bikes. My bike will go beyond 115mph, just rate of acceleration slows down quite considerably.

There is no way on this earth that my bike is producing 33bhp, it's an impossiblty because of how it goes.

yorkie_chris 21-03-10 07:15 PM
Re: SK5 - Query re top speed and restriction
 
Quote:
Originally Posted by diamond (Post 2218629)
Could the guy that owned it before have changed the sprocket, that would make it quick away from the lights but slightly lower top end.
Sounds like bike is running out of puff though, lower gearing only reduces top speed if you are hitting the rev limiter in 6th.

Dizeee 21-03-10 07:15 PM
Re: SK5 - Query re top speed and restriction
 
Quote:
Originally Posted by TazDaz (Post 2218430)
Definitive way is to see if you have decent pulling power between 7k and 9k rpm. If its restricted the revs take longer to get there as at about 6k the rate of rev increase slows, where as full power lets it rev more freely.

Try and get to 10k rpm in 2nd or 3rd. If you can it is not restricted.
10k revs in 2nd or 3rd? I have hit the redline on these gears before (13/14k isnt it?).

yorkie_chris 21-03-10 07:16 PM
Re: SK5 - Query re top speed and restriction
 
No you haven't, rev limiter kicks in at 10,200rpm :)

Dizeee 21-03-10 07:18 PM
Re: SK5 - Query re top speed and restriction
 
Well I have certainly seen the needle sweep over to the red side and the bike screams at this rev range.

yorkie_chris 21-03-10 07:22 PM
Re: SK5 - Query re top speed and restriction
 
Screaming like you hit a rev limiter or something? :-P
Your mate BS'es about there being "much more to go" above 135mph. Pointy has 70bhp, 72 if you put full system and air filter on one.
Yes the acceleration is reduced above about 115mph.

If you still think yours is particularly short of poke, swap bikes with your mate and see what his does.

TazDaz 21-03-10 07:25 PM
Re: SK5 - Query re top speed and restriction
 
Quote:
Originally Posted by Dizeee (Post 2218780)
10k revs in 2nd or 3rd? I have hit the redline on these gears before (13/14k isnt it?).
Well it won't do 13/14k rpm, but if you can swiftly get above 9k revs in 2nd or 3rd then your bike is not restricted.

fizzwheel 21-03-10 07:39 PM
Re: SK5 - Query re top speed and restriction
 
Quote:
Originally Posted by Dizeee (Post 2218775)
My bike will go beyond 115mph, just rate of acceleration slows down quite considerably.
For an SV, In my experience thats quite normal.


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