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Old 01-15-2008, 07:29 AM   #1
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Default question about the RB TM928

dose anyone know the HP rating ont the RB tm928?? thanks jon
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Old 01-15-2008, 08:23 AM   #3
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Hp numbers don't mean much man, I wouldn't judge the motor by that...
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Old 01-15-2008, 08:49 AM   #4
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Hp???? In a 928??? That thing makes more power than what you need. I would guess the thing is close to 3 hp. I would not worry about HP rating; especially for then engine. This motor is a. 28- 7 port with a cut and balenced crank and spins up like a competition .21 on horse steriods.
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Old 01-15-2008, 09:52 AM   #5
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The 928 is a sweet little piece and I agree with everyone else, don't consume yourself with numbers. The trick is getting the power to the ground. Most motors come from the factory with a light switch type powerband and you are either in it or not. What I do is redesign the ports internally making a smooth linear powerband that you can clutch softer to get the torque to the ground sooner for smoother transition in and out of corners with more than enough run up to clear the bigger jumps that always seem to be 10 feet out of the corner. I have done a handful of Picco P3-28's for myself and I get more all around power restricting the carb to 7mm with run times in the 8-9 minute mark compared to the stock 4-5 minutes with the 9mm insert. You don't always want big carb intake area, it decreases fuel signal, reduces velocity which in turn slows dowm throttle response. I have also done a couple Novarossi 528's and ran one at the GLORCS last year and that thing was retarded fast. It was a customers motor in Florida and he wanted the best of the best and he wanted me to test it before sending it back. It was awesome!! I have a local guy with a 928 that he wants done as well so I will be working on it very soon so if you are interested in getting some work done, give me a shout. I'm doing preseason specials for $50 for full race mods to get more engines out there in the offseason. That goes for ANYONE that is interested!! Thanks guys!!

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Old 01-15-2008, 06:06 PM   #6
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Default ok

thanks guys , i just wanted to know what they rated it at ,, i'm going to be running it in a MBX-5 ,, so anyone selling one let me know, LOL ,, ok thanks again jon
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