hi there
04 620, 25,000 miles. evoluzione slave, goldline masters.
Recently I installed goldline masters and had not ridden them since. so last night I was off to bike night and noticed 1- minimal clutch lever movement was needed to disengage the clutch and 2- severe clutch slipping.
So I turn around, get into the garage, and on the clutch lever there's that plunger (forgive me if that's not the name) that goes from the lever to the master. I back that out as far as it would go.
Seems to be OK at that point so off I go. However, I noticed when I really opened up the gas beyond 6k rpm, clutch would slip and considerable lag before fully engaging. Say, like trying to pass on the highway.
The plunger won't back out any further (it has room, but seems like the threads might be fouled) so I'm thinking maybe the clutch isn't fully engaged when the clutch is all the way out.
So before I start fixing things that don't need fixing, is there a simple measurable way to determine if everything is adjusted correctly?
(I did search but didn't find anything that matched my question)
Thanks
Andy
That adjuster sets the free-play and fluid return. You need to feel a little bit of play before the clutch starts to disengage, but that can be difficult to feel on wet clutch bikes if you have the aptc slipper since the lever is so light. When properly set you have a little free-play before the plunger operates the MC/clutch and also you will get good fluid return to the MC. The adjuster might have sealant on it and be difficult to turn. Sounds like you might have backed it out way far? That does not explain your sudden slippage if you did not touch anything else. I would bleed the clutch hydraulics and set the correct fluid level, remove/clean/lube the plunger pin that the adjuster rides against, and carefully set the free-play both by feel and fluid movement in the MC during the bleed. If that does not restore things, I would remove/inspect the slave and pushrod.
BK
**edit** Sorry, I was pressed for time and when I read "goldline" I was thinking brake calipers. Now I understand that you presumably replaced your OE coffin reservoir master cylinders (brake and clutch) with used goldline pee-cup types and this was the first ride after the install. I would still re-bleed, set the correct free-play and most importantly verify that you have robust fluid return to the reservoir. You should see the fluid "jump" in the cup when you carefully release the lever during the bleeding. Also make sure that the clutch line has not been kinked or squished if it was a takeoff from another bike. Be careful with the brake side as well because you don't want the front brake locking up on the road. Hope that helps!
**edit2** By chance are the levers not original to the masters? The setup could be correct/close if the levers are original, but it is likely way off if the levers were sourced separately. There might also be a set screw on the adjuster to watch out for, but I'm no goldline expert....
THanks for the reply. I did bleed very well, I thought at least. I figured if it needed bleeding it wouldn't disengage the clutch? When I originally bleed it, I then clamped the lever down over night as I've done in the past to good effect.
The levers are not original. The ones that came on were rashed and broken, but replaced with the plain jane 4 position adjustable OEM-ish levers. I did find the set screw and the pin it's backed up as far as it'll go. The adjuster turns 'in' easily enough, but it won't back out any further.
figured it out.
I re-cut the treads in the 'nut' portion of the adjuster, backed it out some more and now it's perfect. Engages where it should, doesn't seem to slip at all. I'm going to try it out this weekend to be sure.
thanks BK.
Free play should be 1 - 1.5 mm. If less you may encounter slipping again when stuff gets hot.
Glad you got it sorted out with the simple free play adjustment! [thumbsup]
You're right, my re-bleed recommendation was more of "start over from scratch" thing as opposed to a remedy to your symptom. Tying down the lever overnight is something I always like to do after a bleed as well. Sounds like your head is in the game.
Make sure you also get the brake side setup - lockup there can spoil your day.
BK
Quote from: BK_856er on April 16, 2010, 08:03:00 PM
Glad you got it sorted out with the simple free play adjustment! [thumbsup]
You're right, my re-bleed recommendation was more of "start over from scratch" thing as opposed to a remedy to your symptom. Tying down the lever overnight is something I always like to do after a bleed as well. Sounds like your head is in the game.
Make sure you also get the brake side setup - lockup there can spoil your day.
BK
brake side seemed to be cake. hooked up the bleeder, two pumps and all the air was out and the brake felt perfect.
Clutch side hydraulics seem to be my nemesis for now. part inexperience, part ignorance, I suppose.