Proper Optima Mid Slipper Clutch

[alcyon]

For all you fans of the Optima Mid who still race this car today, i want to inform you guys that i finally decided to do something about the slipper clutch non existence on this car, thus making it not easy to drive. I plan to use associated B4 slipper parts including the spur gears, becuase the parts are cheap and easily available, and also simple in design, without the need to for thrust bearings. I beleive by designing a new top shaft for the Mid, whereas the inner part of the shaft will mate perfectly into the Mids gearbox, but the external part of the shaft will mate perfectly with the B4 slipper parts. the only problem i forsee is the gearcover will have to be cut on the outside and a plug made. I will be designing and making a protoype and will test it extensively. My question is : how many of you guys would be interested to mount the B4 slipper on your Optima Mids? i would only have to make the top shaft, but in volume i can make them cheaper. i estimate they will cost U$30 shipped worldwide if in singular quantities, if 10 pcs i can bring down the price to $20 shipped. By the way if you think you cant trust me, look me up, on ebay and youtube and bmxmusuem i am alcyon2sp.

[kek23k]

Sounds good, I'd be interested in one

[mr. ed]

me too

[mr. ed]

small question: did you verify the B4 spurs are available in suitable sizes for the optima mid?
I'm just asking 'cause I looked at alternatives for the Triumph and lazer spurs and did not find B4 (style) spurs that were large enough for those cars.

[adam lancia]

Optima Mid's use an 87 tooth spur iirc.

[mr. ed]

wooow, careful adam: the B4 teethsize is different form the optima-mids teethsize. What you need to compare is the spur diameters

[offroad170]

hi i just noticed your board while looking for an lrp x12,nosram or similar i have been building buggies for about a year now in all my collecting i came across a brand new optima mid(se or turbo not sure,gold shocks)hardly any wear on original tyres in a friends loft,it still has the original spur,pinion&slipper i like the way the drive system is fully encased.i ran it for a few days then took it apart but its all still there just mixed in with other parts,i'll sort some pictures if your interested we could do a swap for parts or come to some arrangement would be nice to see it get a good home.offroad170/B44.1,catsx2,xray 808.

[alcyon]

http://www.youtube.com/watch?v=YdBUdcm15Xg
my latest video

[alcyon]

My slipper clutch in action. Step right up, step right up...

http://www.youtube.com/watch?v=XdUQhxZO0ig

[Lonestar]

Originally Posted by alcyon

http://www.youtube.com/watch?v=YdBUdcm15Xg
my latest video

I think the old lady could do with more respect

Paul

[alcyon]

Originally Posted by Lonestar

I think the old lady could do with more respect

Paul

old lady ??

[Lonestar]

your car

you're jumping her and landing her on the back end of the chassis all the time... if you aren't landing on the wheels, the slipper isn't really used up to its full potential

Paul