trev_h wrote:Hi, I don't see why you would need to rejet, I have sportster pipes on 2 of my bikes and they made no difference to performance or gas mileage. They sound a little quieter at low revs and a rasp to them at high speed. They are a lot better made than the Honda mufflers.
Medic,
How did the rejet turn out?
I installed some screamin' eagle mufflers awhile back and ended up taking them off due to the noise at freeway speeds. They sure sounded nice below 5000rpm though. I stll have the "H" box on my bike. I'd like to put them back on if I can figure out how to tame the high rpm noise. I'm running 2006 Dyno glide stock mufflers now and they are quiet but deeper sounding than stock.
Cixxer_80 wrote:I run 115 jets on my 1980 custom with sportster mufflers and it runs and sounds great. I live at 2200' eleveation and that's the best combination here. I only have 19K on the bike so the cars are still in excellent shape.
I'll see if I can take a picture tomorrow and post it here for you. I have the Dynaglide mufflers. 2006 model I think. They are longer than the Sportster mufflers by ~3" or so. Not as long as the stock mufflers though. There is a minor loss of ground clearance from the center stand tang hitting the large diameter section of the Dyna muffler on the left side so the stand hangs a little lower. The Screamin' Eagle mufflers are shorter and smaller in diameter so not much of an issue as I remember. It's not much of a problem except on a large bump on a hard charging left-hand turn. You'd have to extend the muffler rearwards about 6" with a straight pipe section to get the center stand to sit right.
The other downside that I didn't notice until afterwards was the rear axle can't be removed unless the left muffler is removed due to interference. The stock muffler angles upwards enough to clear the rear axle.
On my JZR 3 wheeler, I have no H-box, headers about 5' long, and Harley Road King Catalyst model silencers (I'm in the UK, we don't have Mufflers).
I haven't re-jetted the carbs from standard, and have no problems taking the motor to 8500 revs, I'm sure it would easily go higher, I just choose not to do it.
MPG around 40 (Imp gallon), but it's pulling much more weight than when in the bike, and also I have a 15" car rim mated to the rear hub, so I reckon the gearing is a tad lower - around 10mph per 1000rpm in 5th.
malcolm in UK wrote: On my JZR 3 wheeler, I have no H-box, headers about 5' long, and Harley Road King Catalyst model silencers (I'm in the UK, we don't have Mufflers). I haven't re-jetted the carbs from standard, and have no problems taking the motor to 8500 revs, I'm sure it would easily go higher, I just choose not to do it. MPG around 40 (Imp gallon), but it's pulling much more weight than when in the bike, and also I have a 15" car rim mated to the rear hub, so I reckon the gearing is a tad lower - around 10mph per 1000rpm in 5th.
I've now fitted another set of (non-Cat this time) Harley silencers, again Road King or the like (not Sportsters, these are too big), and again, I feel there's no need to rejet, the motor revs right through to as high rpm as I'm prepared to take it.
Bought them off Ebay, virtually new £9.99 ($18 - $20?). Seller was local, so no P&P costs either. Bargain, methinks.
When I had my bike made road worthy last fall, 15 years without being started, I had to go through two other sets of carbs before getting on to work. The mechanic said the final set had been re-jetted already, not sure what size, but that it ran ok regardless. I trashed the original air filter about two months ago and put in a K&N H-500, what a difference. As the left muffler (silencer) was rusted through at the throat just after the Hbox it started to bog down when accelerating/revving. I am still trying to find mufflers to replace the originals but I have since put in 1 3/4 inch galvanizes exhaust that I tapered at the end to create backpressure. Sounds a bit louder, nice and throaty, and runs fine. There’s just a little lag when accelerating now.
"165hp that is what the new 2009 Yamaha VMax is suppose to be pulling this summer. I just cannot hold on THAT well!!! "
Trust me, all you want to do is hold on for dear life. It rips your arms from the sockets, but it just nuts to ride.(and this is coming from the older version with only about 150hp after mods)
vevogel wrote:I have a friend who picked up a used one that had been damaged, cheep. He put it back together and now just eats up his H-D buddies, but with all that noise it's no wonder, unused horsepower going out the tailpipe. Although I like the sound of my CX500(A) with straight pipes I hope to get some mufflers on her soon. Maybe she'll run much better with some baffles?