My apologies, I did not give any context in the video. The bike was in to have the ignition programmed. However as usual there were other issues, mainly jetting and basic ignition set up., it took most of the day to sort this out and we didn't get to the fun part. We did do a hand full of power runs with the best peak 38bhp @ 12100 rpm (a little high due to slightly lean jetting) . We will be doing another session next week, when we will be programming the ignition properly. I would not expect to exceed the 38hp achieved all ready but will hopefully broaden the power range and rideability.

My apologies, I did not give any context in the video. The bike was in to have the ignition programmed. However as usual there were other issues, mainly jetting and basic ignition set up., it took most of the day to sort this out and we didn't get to the fun part. We did do a hand full of power runs with the best peak 38bhp @ 12100 rpm (a little high due to slightly lean jetting) . We will be doing another session next week, when we will be programming the ignition properly. I would not expect to exceed the 38hp achieved all ready but will hopefully broaden the power range and rideability.

I would think about 35 to 40

My apologies, I did not give any context in the video. The bike was in to have the ignition programmed. However as usual there were other issues, mainly jetting and basic ignition set up., it took most of the day to sort this out and we didn't get to the fun part. We did do a hand full of power runs with the best peak 38bhp @ 12100 rpm (a little high due to slightly lean jetting) . We will be doing another session next week, when we will be programming the ignition properly. I would not expect to exceed the 38hp achieved all ready but will hopefully broaden the power range and rideability.

@@john63397 very impressive for a 125. Is it a Reed valve or case Reed intake?

@@billfoster213 It is a disc valve. The manufacturer claimed that it had 43hp back in the 80's, we are not sure if that is crank or rear wheel. Bare in mind this is a high reving twin with low torque so all though the hp numbers sound impressive its not going to pull your arms off lol.

@@john63397 cool. I had a Suzuki that was Disc vavle intake, and I modified the disc by removing material from the opening edge, 3mm, and squaring the exhaust port, in addition to a home made expansion chamber. This was 50 years ago. Best of luck with your racer.

My apologies, I did not give any context in the video. The bike was in to have the ignition programmed. However as usual there were other issues, mainly jetting and basic ignition set up., it took most of the day to sort this out and we didn't get to the fun part. We did do a hand full of power runs with the best peak 38bhp @ 12100 rpm (a little high due to slightly lean jetting) . We will be doing another session next week, when we will be programming the ignition properly. I would not expect to exceed the 38hp achieved all ready but will hopefully broaden the power range and rideability.

@@john63397 Does it have the early type of flash memory on card or a modern one, Zeeltronic, Ignitec...? Thanks

@@robertomalatesta6604 its using an ignitech now.

22.1hp, about what I expected. I'm sure I will increase it though

I think it will be good fun. The wheels are standard AR80K wheels from an Asian model. No real benefit apart from I had them.

This head was machined for the big bore 93cc 53mm bore kit. The head is/was a stock 50cc head so a lot of material has to come out of them to achieve the correct compression ratio and profile. A short reach plug will be needed too.

I think your right, Can't wait for the first test ride

Thanks, will do.

fair point, I have sorted it out now. Too late for this vid but this next one is better kzfaq.info/get/bejne/qLB-YJSrvsm-oH0.html

It sure will, I built one a while ago and it was awesome. This one will be better though.

the standard 4 plate 80 clutch is only good for about 12hp. The plates used in this engine are specially made slightly thinner so that we can get 5 in the standard clutch

👍.. I think its great that not only are people keeping AR's alive, they're still actively improving them! 😎

Its great fun too@@user-ye8xx7gl3j 🙂

It won't be spectacular, the objective here is rideability and sensible rpm. From experience, on this engine the Nikkon will peak at about 8500rpm and will make about 13-14hp and the Firepower will make 15-16hp @ close to 10000rpm (about the limit for road riding imo). I have engines that will make far more power but they are no good for normal road riding.