Parts Wanted K/B 3.5 drum motor

[NAMBA860]

Looking for one of these late model engines. Prefer new

 

[RaceMechaniX]

Shane, can you post a reference pic?

 

[NAMBA860]

Found

 

[Anthony Asaro]

I was curious to the rarity of the drum rotor K&B 21? Was performance increased with the drum rotor? Back in the day front rotor 21's were all that was available.

 

[NAMBA860]

The original .21’s didn’t have a disk or drum intake rotor they used the outboard intake and side mounted it and fuel was distributed through a slot in the crankshaft

 

[larcor69]

I believe this is the drum rotor version

 

[Grimracer]

I have a NIB drum motor.. I can take pictures and provide info if needed

 

[NAMBA860]

How much?

 

[Grimracer]

I don't charge for info and pictures... bahaaaaaa. (the motor is not for sale).. sorry for the confusion.

Grim

 

[NAMBA860]

No problem I bought 5 used ones at the Namaba nats yesterday for $100

 

[Anthony Asaro]

When I first started running in the early 70's all we had were Veco 19's. The Taipan came out but they were subject to crankshaft's breaking although a little better than the Veco. And then the front carb K&B' and right after was the OPS 3.5. The advantage with the OPS was the carb and the tuned pipe and they ran pretty good. I bought a Picco 3.5 and the piston and cylinder weren't a good match with no compression. I was told Picco had a problem with the fitment, but I pretty much stopped running so never replaced the piston and sleeve. Now I have a new Picco that needs a piston and sleeve.

 

[Wasted wages]

When I first started running in the early 70's all we had were Veco 19's. The Taipan came out but they were subject to crankshaft's breaking although a little better than the Veco. And then the front carb K&B' and right after was the OPS 3.5. The advantage with the OPS was the carb and the tuned pipe and they ran pretty good. I bought a Picco 3.5 and the piston and cylinder weren't a good match with no compression. I was told Picco had a problem with the fitment, but I pretty much stopped running so never replaced the piston and sleeve. Now I have a new Picco that needs a piston and sleeve.

Yup, those old OPS 3.5 side port motors would run forever… my first mono had an OPS in it and I won a ton of trophies with it… I even ran it at the IMPBA nat’s in 1988.
The piston and sleeve were so loose I could push the piston all the way out of the top of the sleeve.. but it still ran good.
get a little heat in it on 50% and it ran great..

I’m currently in the process of building a nostalgic version of my first one..
White and yellow .20 Husselcraft with a NIB OPS .21 side port. Two blade X440 prop.
May even put my Futaba square box wheel radio in it on channel 80.