Fzr 600 Cutch cover question

trifgeorge · Post by **trifgeorge** » Sat Feb 19, 2011 6:39 am

Does anyone know what is the round thing with 4 screws in the middle of the inside of the clutch cover for? I want to modify the clutch cover but i don't know what it's there for. Thanks!

rotortech · Post by **rotortech** » Sat Feb 19, 2011 7:38 am

I don't know why that piece is there but I have seen video of these engines running with a plastic window fitted into the cover so I know that everything works without it. I can only guess that the purpose is for heat dissipation or noise attenuation or both.

racerd14666 · Post by **racerd14666** » Sat Feb 19, 2011 5:37 pm

its there to adsorb resonance aka vibration and noise, theirs a rubber damper behind those 4 bolts

Freestyle72 · Post by **Freestyle72** » Sat Feb 19, 2011 5:48 pm

racerd14666 wrote:its there to adsorb resonance aka vibration and noise, theirs a rubber damper behind those 4 bolts

Can something bad happen if those vibrations were not absorbed?

trifgeorge · Post by **trifgeorge** » Sun Feb 20, 2011 3:14 am

Same question as Freestyle72

racerd14666 · Post by **racerd14666** » Thu Feb 24, 2011 8:27 pm

i would imagine and it would just make more noise since it dosent really connect to anything and dosent appear to be structural

trifgeorge · Post by **trifgeorge** » Sat Feb 26, 2011 1:48 am

thanks guys. when i finnish painting the bike and reassemble it, i will try to make a windowed clutch cover.

racerd14666 · Post by **racerd14666** » Sat Feb 26, 2011 7:52 pm

that would be cool to see when its all said and done, i thought about doing that but the thermal cycles and different expansion rates kinda kept me from doing it cus id hate to have a leak cus of a part that makes my motor look cool with out any performance gains

Freestyle72 · Post by **Freestyle72** » Sat Feb 26, 2011 11:12 pm

racerd14666 wrote:that would be cool to see when its all said and done, i thought about doing that but the thermal cycles and different expansion rates kinda kept me from doing it cus id hate to have a leak cus of a part that makes my motor look cool with out any performance gains

It will make your bike lighter

But seriously. It would suck in a crash because it wouldn't fair well at all.

trifgeorge · Post by **trifgeorge** » Sun Feb 27, 2011 5:46 am

It would make my bikee look cool. I dont't think that in a crash, the clutch cover is such in a great danger of getting damaged.... I have to hope i will not crash, because if i would i would strangle myself, as i've put a lot of blood sweat and tears in this bike.

yamaha_george · Post by **yamaha_george** » Sun Feb 27, 2011 6:34 am

T_G,
If you do a window in the clutch, take a look at how Yamaha do it for oil level sites.

I only did this once, and I have no photo of it to show you, BUT what I did was make the site ring & base with the with acrylic & "O" ring first. Then I cut the hole in the case just a tad bigger than the clear section, disassembled the unit ie took out the Acrylic & rubber "O" ring, put the top cap back into the base (help stop distortion when welding ) and then welded the base over the hole in the case.
It was my idea that the less you weaken the case structure the better, in a fall the base edge would get the good news but the Acrylic & top sealing ring would be relatively safe.

If you are confused by this send me a PM and I will sketch out the design for you

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