Help PLEASE - SV650.org

Svadam · 06-06-20, 04:13 PM

Hi guys

I’m stuck at a wall and don’t know what to do
My sv is only doing 100Mph max and I’m really sure it’s restricted, spoke to the bloke I bought it off and have no papers about it. I took the ecu out and it’s says

17GA1
Mgt121

Does anyone know from the ecu numbers would it be restricted?
Iv had a look at the throttle and can’t find anything.

Any help would be much appreciated thank you

Sean_Morgan · 06-06-20, 04:16 PM

When you are at 100mph what rpm's is the engine running at ??

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Svadam · 06-06-20, 04:18 PM

It was near the red, felt like I could do with another gear tbh? But was in 5th

Sean_Morgan · 06-06-20, 04:28 PM

Quote:

Originally Posted by Svadam

It was near the red, felt like I could do with another gear tbh? But was in 5th

5th or 6th ?? If it's 5th you've got another gear

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Svadam · 06-06-20, 04:41 PM

Haha sorry I ment 6th

Sean_Morgan · 06-06-20, 05:07 PM

If it's red lining at 100mph I'd suggest looking towards gearing. As a new owner I'm not expert on the SV so I won't even try and offer advice regarding mechanical or electronic restrictions

Hopefully someone will be along shortly, it's a very helpful and knowledgable group

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Red Herring · 06-06-20, 05:28 PM

Standard gearing on an SV is something like 15t front, 44 or 45t rear depending on model.

I run a 14t front sprocket and mine hits the rev limiter at 121mph in top according to the logger, so if yours is in the red at 100 it must have a huge rear sprocket... which on the bright side should be easy to spot! It's a also a cheap fix providing you can shorten a chain.....

shiftin_gear98 · 06-06-20, 06:12 PM

Obviously all speeds mentioned above have only been done on a private racetrack. Honest officer.

Red Herring · 06-06-20, 06:36 PM

Nah, mine were on a public road, but it was closed to the general public at the time and abroad anyhow.....

SV650rules · 06-06-20, 08:34 PM

100mph is still 30mph over max legal speed on public roads in UK.

If it was restricted it would not get to red line, so as others have said must be gearing. Acceleration will not be as good if you fit larger front or smaller rear sprocket to higher the gearing, so depends what your priorities are.

My 2016 AL7 has a standard primary reduction ratio of 71 / 34 and final ration of 46 / 15 - it is a naked bike and for obvious reasons faired bikes will normally have higher final gearing - no way I fancy being on a naked over 100 anyway, but I like the extra acceleration and tractability at normal UK speeds ( especially country roads and in traffic ).

06-06-20, 04:13 PM	#1
Svadam Junior Member Join Date: Jun 2020 Posts: 4	Help PLEASE Hi guys I’m stuck at a wall and don’t know what to do My sv is only doing 100Mph max and I’m really sure it’s restricted, spoke to the bloke I bought it off and have no papers about it. I took the ecu out and it’s says 17GA1 Mgt121 Does anyone know from the ecu numbers would it be restricted? Iv had a look at the throttle and can’t find anything. Any help would be much appreciated thank you

06-06-20, 04:16 PM	#2
Sean_Morgan Member Join Date: Apr 2020 Posts: 99	Re: Help PLEASE When you are at 100mph what rpm's is the engine running at ?? Sent from my SM-G960F using Tapatalk

06-06-20, 04:18 PM	#3
Svadam Junior Member Join Date: Jun 2020 Posts: 4	Re: Help PLEASE It was near the red, felt like I could do with another gear tbh? But was in 5th

06-06-20, 04:41 PM	#5
Svadam Junior Member Join Date: Jun 2020 Posts: 4	Re: Help PLEASE Haha sorry I ment 6th

06-06-20, 05:07 PM	#6
Sean_Morgan Member Join Date: Apr 2020 Posts: 99	Re: Help PLEASE If it's red lining at 100mph I'd suggest looking towards gearing. As a new owner I'm not expert on the SV so I won't even try and offer advice regarding mechanical or electronic restrictions Hopefully someone will be along shortly, it's a very helpful and knowledgable group Sent from my SM-G960F using Tapatalk Last edited by Sean_Morgan; 06-06-20 at 05:09 PM.

06-06-20, 05:28 PM	#7
Red Herring Member Mega Poster Join Date: Dec 2007 Posts: 2,708	Re: Help PLEASE Standard gearing on an SV is something like 15t front, 44 or 45t rear depending on model. I run a 14t front sprocket and mine hits the rev limiter at 121mph in top according to the logger, so if yours is in the red at 100 it must have a huge rear sprocket... which on the bright side should be easy to spot! It's a also a cheap fix providing you can shorten a chain.....

06-06-20, 06:12 PM	#8
shiftin_gear98 Member Join Date: Mar 2013 Location: At home Posts: 756	Re: Help PLEASE Obviously all speeds mentioned above have only been done on a private racetrack. Honest officer. __________________ Currently driving a Corsa....

06-06-20, 06:36 PM	#9
Red Herring Member Mega Poster Join Date: Dec 2007 Posts: 2,708	Re: Help PLEASE Nah, mine were on a public road, but it was closed to the general public at the time and abroad anyhow.....

06-06-20, 08:34 PM	#10
SV650rules Member Mega Poster Join Date: Nov 2016 Location: Shropshire UK Posts: 1,363	Re: Help PLEASE 100mph is still 30mph over max legal speed on public roads in UK. If it was restricted it would not get to red line, so as others have said must be gearing. Acceleration will not be as good if you fit larger front or smaller rear sprocket to higher the gearing, so depends what your priorities are. My 2016 AL7 has a standard primary reduction ratio of 71 / 34 and final ration of 46 / 15 - it is a naked bike and for obvious reasons faired bikes will normally have higher final gearing - no way I fancy being on a naked over 100 anyway, but I like the extra acceleration and tractability at normal UK speeds ( especially country roads and in traffic ). __________________ 2016 SV650 AL7 Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain Last edited by SV650rules; 07-06-20 at 09:57 AM.