Gearing Recommendations for 630 SMS

[MrClean]

IMHO 14/38 is probably the right compromise for freeway riding. With 14/40 I'm turning ~5800 RPMs at 70MPH.

On my 25 mile commute to work I'm only on the freeway for about two miles. And that's when I start considering switching to 14/38. Dropping the RPMs just a little bit would be nice.

But on my way home I'll hit 5 or 10 miles of dirt roads & trails including desert single track and loose, sandy, twisty fire roads. That's where the 14/40 gearing is just low enough.

For me, the dirt is where the fun really happens. Otherwise, I'd run 14/38 sprockets.

 

[rocko]

IMHO 14/38 is probably the right compromise for freeway riding. With 14/40 I'm turning ~5800 RPMs at 70MPH.

On my 25 mile commute to work I'm only on the freeway for about two miles. And that's when I start considering switching to 14/38. Dropping the RPMs just a little bit would be nice.

But on my way home I'll hit 5 or 10 miles of dirt roads & trails including desert single track and loose, sandy, twisty fire roads. That's where the 14/40 gearing is just low enough.

For me, the dirt is where the fun really happens. Otherwise, I'd run 14/38 sprockets.

That doesn't sound like a commute, that sounds like fun!

14/38 = 5050 rpm at 65 mph

 

[HuskyBrutha]

I've gone up 6 in the rear + new chain. So 44 tooth sprocket. Bike pulls like mad Highway and stuff like that sucks tho. But it's a supermotard.. I don't need no high speeds

I am definitely with Ketek on this one.
Supermotards are for fun: Wheelies, Stoppies and Endo's.

The stock 38 sprocket was a big mistake on Husqvarna's part.
It cuts the bike at the knees.
For normal street riding the geering is just too tall for the power / torque of the motor.
On - Off the throttle is more pronounced and jerky.
Accelerations is crappy.

Go ride a comparable TE630 ( i.e. if your's is PU'd then ride a PU'd TE etc) and feel the difference.

Compared to the SM, the TE has a 42 tooth at the rear, same front sprocket and the firtst four gear ratios are the same.
Compared to the SM, the TE accelerates more swiftly and glides better, i.e. it does not slow down so quickly when you lighly reduce throttle.
Acceleration pickup from anywhere in the range is much swifter with the TE and On - Off throttle response is gentler and purely as a result of all of the above I enjoy riding the TE much more than the SM

I am definitely going to stick a 42 on the on my SM

 

[MrClean]

The stock 38 sprocket was a big mistake on Husqvarna's part.
It cuts the bike at the knees.

I think husky probably went with the 38 for casual riders who have minimal riding experience. Imagine it being your first bike and having your girlfriend on the back. Then, take-off from a stop on an uphill. Husky knew that the rest of us would toss-out the 38 immediately.

I think husky really screwed-up by not giving the SM the taller 5th & 6th gears that the TE has. Traffic commonly flows at 75 to 80MPH on the freeway near my house. With the 14/40 gearing I'm running, I can't even think about cruising the fast lane. (With the stock gearing I could.) That's my only negative on the bike.

 

[HuskyBrutha]

I think husky probably went with the 38 for casual riders who have minimal riding experience. Imagine it being your first bike and having your girlfriend on the back. Then, take-off from a stop on an uphill. Husky knew that the rest of us would toss-out the 38 immediately.

I think husky really screwed-up by not giving the SM the taller 5th & 6th gears that the TE has. Traffic commonly flows at 75 to 80MPH on the freeway near my house. With the 14/40 gearing I'm running, I can't even think about cruising the fast lane. (With the stock gearing I could.) That's my only negative on the bike.

Theoretically, the only way out of the SM paradox is to open the box and replace the 5th and 6th gears with TE gears
Anyone want to comment on the practical feasibility of this.

 

[Gardezy]

thanks for the info...taking a look at the gearingcommander site, looks like I would be happy with changing either to 14 up front or a 43. Will probably go with the 43 as I will be doing 90% riding in the city with some back roads.

you will probably want a 42 like i said i am using a 43 and anything over 112 is getting real high into the rpms. It does not take much to get to that speed while your kane'in on it.

 

[HuskyBrutha]

I am definitely with Ketek on this one.
Supermotards are for fun: Wheelies, Stoppies and Endo's.

The stock 38 sprocket was a big mistake on Husqvarna's part.
It cuts the bike at the knees.
For normal street riding the geering is just too tall for the power / torque of the motor.
On - Off the throttle is more pronounced and jerky.
Accelerations is crappy.

Go ride a comparable TE630 ( i.e. if your's is PU'd then ride a PU'd TE etc) and feel the difference.

Compared to the SM, the TE has a 42 tooth at the rear, same front sprocket and the firtst four gear ratios are the same.
Compared to the SM, the TE accelerates more swiftly and glides better, i.e. it does not slow down so quickly when you lighly reduce throttle.
Acceleration pickup from anywhere in the range is much swifter with the TE and On - Off throttle response is gentler and purely as a result of all of the above I enjoy riding the TE much more than the SM

I am definitely going to stick a 42 on the on my SM

Please ignore the contents of the above quoted post as the part about the 38 tooth sprocket being a mistake is wrong / rubbish.

My Appologies to Husqvarna and to the readers of that post

The TE630 employs a 42 tooth rear sprocket driving a 140/80 tyre on an 18" rim.
The SM630 employs a 38 tooth rear sprocket driving a 150/60 tyre on a 17" rim.
This results in virtually identical gearing for both bikes - prove it at www.gearingcommander.com (Yes, 5th and 6th gears are slightly shorter on the SM compared to the TE)

Exactly why my TE630 accelerates better and has better On - Off throttle response than my SM630 is now a completely different matter that is NOT related to grearing.

 

[MrClean]

Exactly why my TE630 accelerates better and has better On - Off throttle response than my SM630 is now a completely different matter that is NOT related to grearing.

I'm curious if the ECU is different on the SM vs the TE. Would Husky have intentionally dialed-back the SM's performance a bit since it's primarily intended for street use?

The throttle response on my SM630 was a real disappointment for me as well. (A Power Surge 6x helped to fix that problem.) For casual street riders the SM's throttle response might be fine. But for somebody expecting dirt bike performance... no way.

If the TE630's throttle response was anything like my SM's, every TE owner would be pissed-off and saying so. But they're not. So I have to imagine that the ECU is making the difference. If not the ECU, then what?

Somebody please try swapping-in a TE ECU on your SM. My gut tells me there's something there....

 

[HuskyBrutha]

I'm curious if the ECU is different on the SM vs the TE. Would Husky have intentionally dialed-back the SM's performance a bit since it's primarily intended for street use?

The throttle response on my SM630 was a real disappointment for me as well. (A Power Surge 6x helped to fix that problem.) For casual street riders the SM's throttle response might be fine. But for somebody expecting dirt bike performance... no way.

If the TE630's throttle response was anything like my SM's, every TE owner would be pissed-off and saying so. But they're not. So I have to imagine that the ECU is making the difference. If not the ECU, then what?

Somebody please try swapping-in a TE ECU on your SM. My gut tells me there's something there....

My SM630 has PU, a Power Surge 6x and 1000km on the Odometer
My TE630 has PU, no Power Surge and on 20km (twenty) on the odometer and is way quicker than the SM

When I get some time this week, I will swap ECU's and report back.

 

[rocko]

I'm curious if the ECU is different on the SM vs the TE. Would Husky have intentionally dialed-back the SM's performance a bit since it's primarily intended for street use?

The throttle response on my SM630 was a real disappointment for me as well. (A Power Surge 6x helped to fix that problem.) For casual street riders the SM's throttle response might be fine. But for somebody expecting dirt bike performance... no way.

If the TE630's throttle response was anything like my SM's, every TE owner would be pissed-off and saying so. But they're not. So I have to imagine that the ECU is making the difference. If not the ECU, then what?

Somebody please try swapping-in a TE ECU on your SM. My gut tells me there's something there....

Why would they make the SM slower?!?!?!?!? Do they think street riders just bought it for the looks?

Are the SM and the TE subject to the same emissions regulations? If they're not then I can understand.

 

[willie]

Curious about performance differences between the TE and SM so I had a quick look at the parts list.
1) Different exhausts.
2) Closer ratio transmission in the SM.
3) 3 SM ECUs including a limiter ECU and 1 TE ECU for EU bikes, 2 SM ECUs and 1 TE ECU for US bikes, 2 SM ECUs and 1 TE ECU for AUS bikes and 2 and 1 for JAP bikes.
What's with all the different ECUs? Different emission requirements? Different power requirements? What?
Inquiring minds would like to know!

Seems like the only sure way to obtain maximum performance from the TE/SM other than the obvious power up kit is to buy the Twin Arrows which includes a power enhancing ECU in the package or maybe you can buy the ECU alone and use whatever exhaust you want. Can anyone provide the ECU # included with the twin Arrows?

 

[MrClean]

My SM630 has PU, a Power Surge 6x and 1000km on the Odometer
My TE630 has PU, no Power Surge and on 20km (twenty) on the odometer and is way quicker than the SM

When I get some time this week, I will swap ECU's and report back.

Thank you!!! I've been dying to know if the two ECUs produce noticeably different results.

Willie - I've been told that you cannot purchase the ECU separately from the Arrow cans.

 

[MrClean]

Why would they make the SM slower?!?!?!?!? Do they think street riders just bought it for the looks?

Are the SM and the TE subject to the same emissions regulations? If they're not then I can understand.

If Husky produced this video, then Yes... Maybe they do think people buy the SM630 just for the looks.

http://www.youtube.com/watch?v=oZGIAxyJ0Es

With all the different ECUs available for the 630, I wonder about the emissions requirements too.

The Husky parts catalog has a "Race ECU" available for my TE310. Why don't they have a race ECU available for my 630? So they can scam me out of $1100 for the Arrows/ECU?.... Maybe.

 

[willie]

I wonder what ECU Husky uses to get the "claimed" 57HP for the 630. ECUs list for $300.

 

[rocko]

If they installed the wrong ECU at the factory can I get it replaced with the correct one under warranty?

I want the fast one!

 

[Russ]

Willie - I've been told that you cannot purchase the ECU separately from the Arrows cans.

This is certainly the case in Australia - the pipes & ECU come as a pack. I had them fitted despite the exorbitant cost and they cleaned the performance up considerbly. The bike was standard before then, i.e. no power up mods.

I wonder what ECU Husky uses to get the "claimed" 57HP for the 630. ECUs list for $300.

I have wondered the same thing in view of how poor the bike's performance is in stock trim, i.e. before any power up mods.

 

[Ketek]

Mine has the claimed 57HP with PU and standard pipes. This is at the crank though. But I think Husky never claimed that the bike had 57HP at the wheel..

The 630s don't lack power, the throttle response is just not very agressive. The JD Power Surge should get rid of that problem though.

 

[rocko]

Mine has the claimed 57HP with PU and standard pipes. This is at the crank though. But I think Husky never claimed that the bike had 57HP at the wheel..

The 630s don't lack power, the throttle response is just not very agressive. The JD Power Surge should get rid of that problem though.

You have the arrow cans and ECU, correct? Maybe when my bike is broken in I'll get it dynoed. Right now it seems slower than my SV for sure.

 

[Ketek]

You have the arrow cans and ECU, correct? Maybe when my bike is broken in I'll get it dynoed. Right now it seems slower than my SV for sure.

No, I have the original ECU and original cans. Only thing done is the PU kit and the 44 sprocket.

Maybe there's a difference in EU and US ECUs after all.. I don't know.

 

[HuskyBrutha]

Mine has the claimed 57HP with PU and standard pipes. This is at the crank though. But I think Husky never claimed that the bike had 57HP at the wheel..

The 630s don't lack power, the throttle response is just not very agressive. The JD Power Surge should get rid of that problem though.

My SM has PU and stock exhaust and JD Power Surge and I was very very happy with it.....that is untill I took delivery of
my new TE630 with PU only.

With 2km on the clock, the TE630 was way faster than my SM630.....yeah...... Go Figure.

My SM ECU part No: ECU181A001A 9X21 0163000.
My TE ECU part No: ECU181A001A 0125 0181000

So we do know that the TE and SM have different ECU's.

By the way Ketek, it seems that we both have the same ECU's on our SM's

Also my TE and SM both came from the same batch of bikes broght into the country and the engine numbers are not too far apart.