I think the stock FWW is on the heavy side, quite often.

I have a 9-ish ouncer on my RB-modded 2005 DE 250. I wouldn't want it much bigger, most times.

Agree. The '12/'13 has a few extra oz. on the primary side anyway. I immediately could tell the difference. With a 10 oz. it's very close to he '07 with a 14 oz. I will likely go naked 2K-2 for non-technical courses.


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ROFLMAO the early '70s enduro bikes were like that, they seemed to have a mind of their once they were wound up

Ohh yes, and it was too much.. but I did not know where to start, so I just started as heavy as possible by measuring how much space the 2K-2 flywheel left me for a weight..
But we needed to take some weight of, and ended up with a 25 ounce weight, he like to tractor it around in a gear too high, and used to stall alot, but he's done with that, it's really hard to stall now;)..

In the early '70s even the Euro MX bikes had heavy flywheels (Motoplat, Femsa). The Suzuki TMs and Honda CRs had the small internal rotor Ignitions. You must remember the TM400.


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I do remember the Suz tm400. I fortunate to never ride one. My dad had one, briefly. He said is it was fast (and scary) in the desert, and horrifying in the woods. He went back to modded Suz 125 enduro's.

Got a chance to fit up the massive flywheel weight. I was using the 2T flywheel weight which is about 8 oz and the S3 I tried this weekend was 24 oz. I want to begin say thatthe motor really is not particularly affected by the weight as far as revving goes. When you crack the throttle there is only a slight hesitation. Where the weight really shines is powering out of a corner the power is so smooth and right there. I did not stall the motor once this weekend and I am usually good for that a few times going through some rutted downhill off camber corners. I have rode some bikes with a large flywheel and thought they were doggy, but I am beginning to think that bike I rode was not really running at peak potential with or without the weight. I would recommend the S3 weight to anybody with a 2k3 ignition. :D

How would you describe the power when the power valve opens? Any noticible change from stock? Did you notive it starts easier? Not that I have any issue with starting but in the past I noticed the weights let you get away with a half kick. As you mentioned they do help from stalling but I have an autoclutch so that is not advantage for me.

I would say that it smoothed everything out. Just an electric style power delivery. No punch to speak of.

Starting has always been quite easy on my bike so I cannot say either way.

Probably feels more like a Pampera now than a race bike.