• Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

2000 Sm610 S Power Increase By Swapping Only The Carb

B

Bogdan Lancor

Husqvarna
Hello all, thank you for having in the forums!

TL;DR: if I were to swap the carburettor (currently Mikuni, no clue on model) to a Keihin FCR MX41 without swapping the piston to the high compression one (as seen on the 2005+ models), would I be able to get some extra ponies?

Long version:
I passed my A motorcycle license 2 months ago and decided to go with a SuMo as my first bike – mostly because I do soft-ish Enduro and dirt riding almost every weekend (the other option would've been to get a MT-07). After a ton of research and option–weighing I decided to go with the 610SM. While I could've gone to a different city and test a 2006 version, I decided to skip this as the drive would've been a tad too long (550 km / 340 mi, 7 hr drive to the other side of the country) and exhausting for just checking out a motorcycle I wouldn't known (back then) if I would like; so, I went with the (only) option I found in my city.

After reading all of the reviews, I was expecting a bit more... power?! As in, I was expecting power wheelies and a risk of high-sides if I didn't pay attention to my wrist, and the motorcycle is... well, tame... Don't get me wrong, my smile extends all the way to my ears while riding it, but I would like a bit more power. Not necessarily for all around SuMo hooliganism, as I'm a beginner, but having ridden more powerful bikes during the motorcycle school, I guess I'm a bit spoiled.

So my first question would be, if I were to swap a Keihin carb, without the high compression piston, would I see some noticeable HP gains? I'm basing this supposition on the info from this post


mg94 said:
There's a lot of confusion I see on what and when things changed, so let's clear things up:
-1998 to 2000 SM 610 R/TE 610 (minus the E): left kicker, racing model, very similar top end to the SM 610 S and TE 610 E (same bottom end as Seel Replica).
-1998 to 2004 SM 610 S/ TE 610 E: street oriented model, 9.5:1 compression ratio, e-start and 800 grams e-start counterweight (the steel disc behind the flywheel). Dell'orto phm 40 until 2000, mikuni 41 depression later (ugh). 46 hp (34 kw) quoted on the bike's documents. No rev limiter, at least until 2000 no catalyctic converter.
-2005 to 2007 SM 610/ TE 610 (no letters): 11:1 compression ratio, 500 grams e-start counterweight, FCR 41 MX. 54 hp (40 kw) quoted on the documents. Rev limiter at around 8200 rpm.
-end of 2007 to 2009: SM 610 ie / TE 610 ie: same as previous, fuel injection and rev limiter at around 7600 rpm (but not all models, some still at 8200). 52 hp (39 kw) quoted on the documents.
-2010 to death of Husqvarna: SM 630 R/S (no real relevance of last letter)/ TE 630. 12.4:1 compression ratio, piston bore from 98 mm to 100, completely different head design (DOHC instead of the older SOHC). 60 hp (45 kw) quoted on the bike documents.

-2004 SM 634 R Eddy Seel Replica: Race model, no compatibility with street models. (longer stroke kit).
Click to expand...


Second question – since I guess I'm after more torque, not necessarily more power, as I won't be doing much highway riding, if any (not like there are many highways to begin with in Romania), mostly commuting, maybe the occasional twisties in the mountains, would I be better off by just swapping the rear sprocket to a 48T?

Third question – were I to do the carb swap and get the HTM 100mm bore kit / piston (don't know the comp ratio), would I get an incresed performance, and would this be worth it? It would amount to about 1500€, (+ labor costs, maybe shipping? Not sure if the shipping would be free or not).

Thanks in advance!
 
I can only comment on the FCR41 carb conversion.....I did the conversion to my 2000 TE610E and it made the bike a lot more responsive. The bike is a lot more fun to ride, it does feel quicker. The huge bonus to this conversion is that the bike now starts easily hot or cold. I used the OCEMN needle in my FCR41, you have to heat the tank in the cable pull area of the carb, and shape it a bit to give the necessary clearance.



Bogdan Lancor said:
Hello all, thank you for having in the forums!

TL;DR: if I were to swap the carburettor (currently Mikuni, no clue on model) to a Keihin FCR MX41 without swapping the piston to the high compression one (as seen on the 2005+ models), would I be able to get some extra ponies?

Long version:
I passed my A motorcycle license 2 months ago and decided to go with a SuMo as my first bike – mostly because I do soft-ish Enduro and dirt riding almost every weekend (the other option would've been to get a MT-07). After a ton of research and option–weighing I decided to go with the 610SM. While I could've gone to a different city and test a 2006 version, I decided to skip this as the drive would've been a tad too long (550 km / 340 mi, 7 hr drive to the other side of the country) and exhausting for just checking out a motorcycle I wouldn't known (back then) if I would like; so, I went with the (only) option I found in my city.

After reading all of the reviews, I was expecting a bit more... power?! As in, I was expecting power wheelies and a risk of high-sides if I didn't pay attention to my wrist, and the motorcycle is... well, tame... Don't get me wrong, my smile extends all the way to my ears while riding it, but I would like a bit more power. Not necessarily for all around SuMo hooliganism, as I'm a beginner, but having ridden more powerful bikes during the motorcycle school, I guess I'm a bit spoiled.

So my first question would be, if I were to swap a Keihin carb, without the high compression piston, would I see some noticeable HP gains? I'm basing this supposition on the info from this post





Second question – since I guess I'm after more torque, not necessarily more power, as I won't be doing much highway riding, if any (not like there are many highways to begin with in Romania), mostly commuting, maybe the occasional twisties in the mountains, would I be better off by just swapping the rear sprocket to a 48T?

Third question – were I to do the carb swap and get the HTM 100mm bore kit / piston (don't know the comp ratio), would I get an incresed performance, and would this be worth it? It would amount to about 1500€, (+ labor costs, maybe shipping? Not sure if the shipping would be free or not).

Thanks in advance!
Click to expand...
 
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