May Have Just Lost My RX3 - Page 2

FastDoc · 06-20-2016, 06:25 PM

I had a good ride on Spud's and I can't say how restricitive the exhaust was but I can say the bike sure was nice and quiet. The power delievery was, shall we say, tame.

I'd be inclined to enjoy it as is without 'power mods'.

As an example I offer my KLX-250S.

Stock it was on the low end of OK for HP.

A stage 1 kit woke it up, a lot, and gave it HP nearly what my DRZ-400S makes (without the torque of course) but it was loud. So loud that it's noise was the primary reason I sold it and went up to the Suzuki.

With that said I had a Q4 pipe (the quietest available) but I'm noise adverse.

Goes back to when I was married....

FastDoc · 06-20-2016, 06:27 PM

'If this was a carbureted version, that would be fun to tinker with. I did the same mods to Q that Boostcrazy did on his XF200 and he got 20hp out of it on the dyno, from the stock 15hp. '

a 33% boost is HUGE.

My Q's were also mild but smooth and quiet and reliable. I did not want to mess with them. Of all the CB's I've had I miss Q the most. That really was a good riding and a good looking bike.

2LZ · 06-21-2016, 10:22 AM

Quote:

Originally Posted by FastDoc

'If this was a carbureted version, that would be fun to tinker with. I did the same mods to Q that Boostcrazy did on his XF200 and he got 20hp out of it on the dyno, from the stock 15hp. '

a 33% boost is HUGE.

My Q's were also mild but smooth and quiet and reliable. I did not want to mess with them. Of all the CB's I've had I miss Q the most. That really was a good riding and a good looking bike.

That's for sure. The Q's were in a class all their own, for a CB. I really enjoy the heck out of mine.

Regarding modding the RX3, it's a habit of mine since I was a kid. My oldest brother (who was my wrenching mentor) said, "The factory hides all the power inside. It's your job to let it out." Like you said Doc, "tame". I'm hoping something can be done for that someday.

FastDoc · 06-21-2016, 11:48 AM

Maybe some manufacturer will come out with a 351cc kit, like is available for the KLX.

There's no replacement for displacement.

Plus no intake or exhaust or computer changes would be needed.

detours · 06-21-2016, 11:57 AM

Quote:

Originally Posted by FastDoc

Maybe some manufacturer will come out with a 351cc kit, like is available for the KLX.

There's no replacement for displacement.

Plus no intake or exhaust or computer changes would be needed.

In the meantime, keeping the bike as light as possible does a lot to improve performance. I've been running mine without bars and side cases, and I'm so happy with the performance that I'm going to try 14T/45T gearing from my current 13T/44T.

2LZ · 06-21-2016, 12:04 PM

Quote:

Originally Posted by detours

In the meantime, keeping the bike as light as possible does a lot to improve performance. I've been running mine without bars and side cases, and I'm so happy with the performance that I'm going to try 14T/45T gearing from my current 13T/44T.

I'll be curious to see how you like it. The RX3 is not a light 250.
The 13 countershaft with the stock rear does wake it up and get rid of that pesky "over-slip" you have to do to get it rolling in 1st....but it does chew a bit off the top speed.

pyoungbl · 06-21-2016, 12:06 PM

I once did the full monte with a Ducati...high compression pistons, more displacement, balanced crankshaft, ported heads, Aarow exhaust, dyno tuned ECU and lighter flywheel. Man, that bike rocked! It also set me back about $7K for the mods. My lesson learned was that the cost/benefit ratio quickly expands...more cost for less benefit with each modification. I think we will all be smart to hold out for the 450cc Zong rather than trying to punch out our 250cc lump with the hope for an added 5 hp. There is supposed to be a version of the NC250 used in another bike that is getting more power already. I'm guessing it is using a different cam, exhaust, and ECU to get more hp at higher rpm.

06-20-2016, 06:25 PM	#16
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	I had a good ride on Spud's and I can't say how restricitive the exhaust was but I can say the bike sure was nice and quiet. The power delievery was, shall we say, tame. I'd be inclined to enjoy it as is without 'power mods'. As an example I offer my KLX-250S. Stock it was on the low end of OK for HP. A stage 1 kit woke it up, a lot, and gave it HP nearly what my DRZ-400S makes (without the torque of course) but it was loud. So loud that it's noise was the primary reason I sold it and went up to the Suzuki. With that said I had a Q4 pipe (the quietest available) but I'm noise adverse. Goes back to when I was married.... __________________ Happy to serve.
	2

06-20-2016, 06:27 PM	#17
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	'If this was a carbureted version, that would be fun to tinker with. I did the same mods to Q that Boostcrazy did on his XF200 and he got 20hp out of it on the dyno, from the stock 15hp. ' a 33% boost is HUGE. My Q's were also mild but smooth and quiet and reliable. I did not want to mess with them. Of all the CB's I've had I miss Q the most. That really was a good riding and a good looking bike. __________________ Happy to serve.
	1

06-21-2016, 11:48 AM	#19
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	Maybe some manufacturer will come out with a 351cc kit, like is available for the KLX. There's no replacement for displacement. Plus no intake or exhaust or computer changes would be needed. __________________ Happy to serve.
	0

06-21-2016, 12:06 PM	#22
pyoungbl Join Date: Feb 2016 Location: Portsmouth, Virginia, USA Posts: 632	I once did the full monte with a Ducati...high compression pistons, more displacement, balanced crankshaft, ported heads, Aarow exhaust, dyno tuned ECU and lighter flywheel. Man, that bike rocked! It also set me back about $7K for the mods. My lesson learned was that the cost/benefit ratio quickly expands...more cost for less benefit with each modification. I think we will all be smart to hold out for the 450cc Zong rather than trying to punch out our 250cc lump with the hope for an added 5 hp. There is supposed to be a version of the NC250 used in another bike that is getting more power already. I'm guessing it is using a different cam, exhaust, and ECU to get more hp at higher rpm.
	1