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Old 09-17-2012, 12:03 AM   #1 (permalink)
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2002 Yamaha SXR 600

Hey everyone! New to the site and glad to be here! Sorry if this is posted in the wrong section! Just looking to get some help on this topic.

I currently have an 02 SXR 600. I bought it prior to last Winter and rode about 2500 miles. It is a great trail sled, but in the deep powder it doesn't have much power. I'm looking to keep this for a few more years until I can talk myself into spending the money for an Apex.

Anyway, I was wondering what kind of upgrades can be done to this sled to make it run a little better, faster, and have more power. I'm not looking to spend any more than about 800 dollars. I've researched clutch kits, pipes, and v force reeds, but I was wondering what you guys think.

Thanks for any help.
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Old 09-17-2012, 07:50 AM   #2 (permalink)
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If you like that 600 and the way it handles, you likely wont like the Apex!
The 1 thing that 600 lacks in general is HP! Yamaha, again in general, real improve with porting! You seriously can gain 20+ hp! Port, pipes, reeds, airbox and jetting could net you 25 or more!
Some help me hear, wasn't it at about 100hp? Maybe 110?
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Old 09-17-2012, 02:58 PM   #3 (permalink)
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Thanks for the reply! I know the Apex and SXR are two completely different sleds, but I have rode an Apex several times and love it...I just can't justify spending that much money yet.

I heard the clutch kit adds a few HP and it only costs about 230. I've considered buying it and installing it prior to this season.
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Old 09-17-2012, 03:42 PM   #4 (permalink)
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Does not add hp, just makes better use of what it has.
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Old 09-17-2012, 06:34 PM   #5 (permalink)
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Thats ALOT for a clutch kit! Porting is basically free! I would get rings atleast while your in there depending on milage!
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Old 09-18-2012, 08:37 PM   #6 (permalink)
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skip the so called clutch kits, spend some time tuning what you have after you alter a few items for cheap or free.

that sled responds well to a thinner head gasket if you can run premium fuel. you can thin your own or order one from the mtn sled models.

next is a gear change. probably the cheapest and best felt mod using the 'seat of your pants dyno'. anything that works on the 700 will cross over to your 600. reeds, reed spacers, some air box mods along with a silencer mod, they even use the same pipes.

be prepared to buy some new pilot jets, main jets, rivets for the clutch weights and a spring or two.
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Old 09-19-2012, 09:11 AM   #7 (permalink)
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Anyone know for sure what the HP was on the 600? That is the triple, triple pipe right?
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Old 09-19-2012, 08:01 PM   #8 (permalink)
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yamaha listed it at 98hp. the SXr was a three into one pipe configuration. the 600 SRX, which was dropped after 99 had about 124hp and was triple piped from the factory. 2 completely different engine designs.
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Old 09-19-2012, 09:33 PM   #9 (permalink)
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Buy a Polaris or a Cat
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Old 09-20-2012, 08:07 AM   #10 (permalink)
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They were differnt engines? Or just the exhaust? Never understood the triple / single pipe? Polaris did that too! Glad Cat never did!
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Old 09-21-2012, 11:11 PM   #11 (permalink)
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They were differnt engines? Or just the exhaust? Never understood the triple / single pipe? Polaris did that too! Glad Cat never did!
srx had the power valves, much larger and different intake, independent heads, different crank phasing, different compression, timing curves with the cdi, pretty much a laundry list of differences, not to mention the factory triple pipes and increased hp.

yamaha only did the triple/triple on the srx models, both 600 and 700. all the others had the three into one. must have been a weight or reliability thing, dunno.
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Old 09-22-2012, 07:18 PM   #12 (permalink)
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Buy a Polaris or a Cat
Whoa! He's got a good (great) sled, no sense complicating matters!
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Old 09-23-2012, 06:37 PM   #13 (permalink)
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My only issue is the Lack of HP!
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