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Main Area => General GS500 Discussion => Topic started by: roughspanker on August 30, 2009, 09:12:13 AM

Title: Bike Shudders as if undershifting (under 5k rpm) - Clutch Spring??
Post by: roughspanker on August 30, 2009, 09:12:13 AM
So I thought I succesfully changed my springs and plates (first time), but the bike doesnt feel the same. It acts like its undershifting when I'm at about 4-4.5k rpm and the engine shudders a bit. It sounds different too. I think the springs are tightened to the same tension, but I did it by hand and it was my first time so I can't be sure. I started by screwing in the spring bolts until I felt a tension, when I hit this point on each spring they all looked to be at the exact same length too. Then I did a 15 degree turn on the socket wrench to tighten the bolts snug. Now did I overtighten or undertighten or what? I did an oil/filter change and unless I have too much oil (doubt it) I can't see why anything besides the clutch springs would be causing the shake. Anyone have an insight? What about friction plate alignment? I didn't align them to any mark because I didn't find one on the plates suzuki gave me.

Thanks
Title: Re: Bike Shudders as if undershifting (under 5k rpm) - Clutch Spring??
Post by: joshr08 on August 30, 2009, 10:49:12 AM
im not  sure on the 500 but any clutch i have ever done i have always tighted the cover plate/spring bolts tight.  as far as i knew thats why they only have a certain amount of threads.  they cant go in to far.  I would say that your bolts are still loose.  The springs are a certain tension without you leaving the bolts loose or to tight.
Title: Re: Bike Shudders as if undershifting (under 5k rpm) - Clutch Spring??
Post by: ineedanap on August 30, 2009, 11:35:00 AM
I'm with josh.  You need to keep screwing all 6 clutch spring bolts in evenly until they all stop.  Once you feel tension, you still have a whole lot more turns to go before it stops.  (probably 10 or more full turns)  Then tighten the bolts to the torque spec in your service manual or just give them a little snug to keep them from backing out.  
Title: Re: Bike Shudders as if undershifting (under 5k rpm) - Clutch Spring??
Post by: roughspanker on August 30, 2009, 12:39:36 PM
Oh god I hope I haven't done too much damage!

Thanks for the info I'll try it out asap.
Title: Re: Bike Shudders as if undershifting (under 5k rpm) - Clutch Spring??
Post by: roughspanker on August 31, 2009, 06:43:16 AM
I'm gonna do this job today, and I had one last question for the pros to make sure I don't wreck things.

Where should the end of the bolt be positioned relative to the holes in the last plate? As it is now, the very end of the bolt is sticking out about the width of a quarter. If I go by what you guys have said, it shouldnt even be visible right?
Title: Re: Bike Shudders as if undershifting (under 5k rpm) - Clutch Spring??
Post by: ineedanap on August 31, 2009, 08:53:30 AM
Wherever the bolts end up...who cares...it doesn't matter.  What matters is that the bolts need to be screwed in until they stop, then snugged slightly.  The torque spec is 4.5 ft/lbs so don't go crazy with a big rachet.

If you leave them loose, eventually they'll back out and grind their way thru your clutch cover.
(http://img.photobucket.com/albums/v432/vvv692/Nuotrauka-0006.jpg)





Title: Re: Bike Shudders as if undershifting (under 5k rpm) - Clutch Spring??
Post by: roughspanker on August 31, 2009, 02:11:49 PM
Quote from: ineedanap on August 31, 2009, 08:53:30 AM
Wherever the bolts end up...who cares...it doesn't matter.  What matters is that the bolts need to be screwed in until they stop, then snugged slightly.  The torque spec is 4.5 ft/lbs so don't go crazy with a big rachet.

Yeah but it helps to know about how far they go in since I dont know how to measure the torque and have no tool to do it. Im going purely on the way it looks and the amount of turns.
Title: Re: Bike Shudders as if undershifting (under 5k rpm) - Clutch Spring??
Post by: ineedanap on August 31, 2009, 02:27:52 PM
Quote from: roughspanker on August 31, 2009, 02:11:49 PM
Im going purely on the way it looks and the amount of turns.

That's wrong...THAT WON'T WORK...Doing it that way will just ruin parts.  

1. the way it looks doesn't matter.
2. the amount of turns doesn't matter.

No offense, but you're missing the point.  Look at these bolts like any other bolts.  You wouldn't use 2.76 turns on your axle bolt because "it looks right", would you?  Of course not, you'd tighten it down.  Think of these the same way as every other bolt.  

ONCE AGAIN, TIGHTEN ALL OF THEM ALL THE WAY UNTIL THEY STOP.  THAT'S HOW FAR THEY NEED TO GO.  

here's the step by step if it helps...

1.  put spring on bolt and hand tighten bolt into hub until you feel pressure.  (do this for each of the 6 bolts/springs)
2.  once you've finished putting all 6 bolts in hand tight, grab your 10mm socket/rachet combo and tighten the first bolt a few turns.  (you'll feel some pressure for the spring)
3.  move in a star pattern tightening each bolt a few turns.  (top, then bottom, then left, then right, then top again, then bottom again...) KEEP DOING THIS OVER AND OVER!!!
4.  eventually after lots of turns one of the bolts will bottom out and stop.  You will feel the resistance when this happins.  Stop tightening that bolt.
5.  continue to tighten the other bolts until ALL the bolts have bottomed out.
6   Since you don't have a torque wrench go back and tighten each bolt just a light itsy bitsy teeny bit more so they don't unscrew themselves.  If you had a torque wrench you would tighten to 4.5 ft/lbs.
7.  have a beer and celebrate a job well done.


Title: Re: Bike Shudders as if undershifting (under 5k rpm) - Clutch Spring??
Post by: roughspanker on September 01, 2009, 06:23:50 PM
Well I took everything apart once more, and I discovered the bolt was already bottomed out as you suggested, I was being paranoid for nothing. Although, I hadn't tightened them in the star formation, so this time they should be near perfectly equal tension.

The first time I didn't know what size wrenches to use, didn't know what went where and it took me maybe 7 hours to take apart and put together, and I spilled oil all over too, it was a mess. This time it took 2 hours to take it all apart including setup (setting down newspapers and gathering tools) and no issues except I got a little oil on my pipe  :embarassed:   But anyway I just wanted to say all that because it took me a week to get myself together and grow some balls to take my bike apart rather than spend money on a mechanic. It was my first time doing anything on a motorcycle and everyone should know it's not all that hard once you take a peek inside and gets some tools, read up on the net and this forum. Youll save a lot of money and learn, and the next time it'll be way quicker and you don't have to rely on a mechanic who might mess things up on purpose or by accident. This especially goes for people who abuse their bike.    :icon_twisted:

Thanks a lot for the help, I hope other people can learn from this topic too, ineedanap ur the bomb.

edit: Oh and the bike runs like its on steroids

Title: Re: Bike Shudders as if undershifting (under 5k rpm) - Clutch Spring??
Post by: ineedanap on September 01, 2009, 06:59:36 PM
Quote from: roughspanker on September 01, 2009, 06:23:50 PM
I was being paranoid for nothing.
You were making sure it was done right.  I wouldn't call that paranoid.  It's more like professionalism.  

Quote from: roughspanker on September 01, 2009, 06:23:50 PM
But anyway I just wanted to say all that because it took me a week to get myself together and grow some balls to take my bike apart rather than spend money on a mechanic. It was my first time doing anything on a motorcycle and everyone should know it's not all that hard once you take a peek inside and gets some tools, read up on the net and this forum. Youll save a lot of money and learn, and the next time it'll be way quicker and you don't have to rely on a mechanic who might mess things up on purpose or by accident.

Well said!