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end of J. Costa

RollaCosta

Active member
Joined
May 16, 2023
Messages
164
Location
Australia
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Gday all
today is the day when i say goodbye to my adventures with J. Costa variators.
The one i had installed, has has a fair run of a 20000km and the rollers are buggered as supposed to be.
i have had 25g rollers installed as they do not make heavier. i wish they were more like 25.5g but not enough steel weight can fit into 34mm shells.
Moreover i believe that this upgrade may have caused overheating and destruction of the driven pulley bearing in the lid, causing the nut to unroll and some further shaft damage.
But it was fun, beating MT-09 and MT-10 off the lights and in the mountain twisties ;)
“We shall make C650 great again”, this time with stock variator mk2 and 42g dr pulleys rollers
I have changed my avatar but wont change username.
All in all, the best J.Costa was for T-Max but with heavier 16g pistons.
They are just no good for larger scooters.
All the best
 

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Got it going, with stock variator and 42g sliding rollers by Dr.Pulley.
Wow what a rush, without the buzz.
The only issue left is some skips and struggle in the clutch during the first half-second off the lights.
My guess is that Dr.Pulleys hiT clutch needs a different combo of spring sets. It is engaging at 900 rpm now, and locking completely at 2160 rpms. I am thinking of taking the latter number even higher with a stronger set.
Any proficient hiT 302002 tuners here?
 
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