Performance Exaust End Cap

more punch

Azza if you want a little bit more punch off the bottom all you need to do is limit the fuel squirt on your carbie! I did this to mine and it makes heaps of difference!! The screw is under the tank on the right side of the carbie underneath the black cover. Give it a try first and it wont cost you a cent to try.

carby

Azza, if you own a dirt bike you have to be mechanical minded or have lots of money? On the right side of the carby is a black plastic cover with a phillips head screw. Do get this undone you might have to loosen the clamps around the carby manifolds and tilt it slightly? When you get it off you will see a screw with a spring on it that controls the length of time of the fuel squirt that the pump controls. That is what you are doing adjusting the accel pump squirt. Turn the screw clock wise to reduce the squirt. If you wanted to you could remove the carby and either time the squirt and you would be able to see the difference? But I'm guessing you wont want to do this!
So turn the screw aprox half a turn to start with and see how you like that.
Good luck.

Does Prorider have a website? I couldn't find one for them.

Re:

i've seen that the factory use a quat D pipe which is identical to the OEM stuff so i'm really not sure where you're coming from?

the FE end cap has a 25mm hole, the FC end cap has a 35mm hole and i dynoed the two. there was a 3/4 bhp difference all the way from zero for the Fc pipe.

if you aren't running a lineaweaver cam you don't need bigger. i run an LX2 and had a flat spot to about 4k but an open 'can' almost ANY can will stop that.

regards

Taffy[/quote]

I was about to attack the standard "throttled" enduro end cap in my muffla to make a straight thru end cap thinking there was a useful amount of "free" HP's within, now whilst doing some research i find a 4 yr old statment that makes me think i should just repack and reinstall it stock. I have a 30mm outlet, stock cam, hipo valves and dvsk. I was planning to build a new insert with continuing perf tube and packing at same dia to the end. But i now wonder why I should bother.
not interested in more noise for the sake of it but if there is a decent lift in performance then I am happy to make a little more noise.
I have read a few reports here of people free flowing end caps but Taffy's seems to be the only one with figures attached. Anybody else done dyno/DB tests?

the 35mm end cap from the FC makes exactly the same noise = no more at all. otherwise I stand by that little lot!

regards

Taffy

Xelent Taffy, Thanks for that. So I can pick up a little HP right across the range, I expect crisper throttle responce too, but what about the torque?
Sometimes less restriction = less torque?
Might Have to pull out the soldering iron and the jet drills too aye
Surely a throatier sound with a bigger tail pipe just no more DB's?
Coz my stock pipe is not far off a sewing machine for noise (more noise from intake whilst riding)
Now to see if I can find an FC end cap somewhere near this neck of the woods.

no extra noise whatsoever, as anyone from europe will testify: they have only ever heard one note from an OEM tailpipe.

i don't think that a restricted pipe that is less restricted produces less torque. something bigger than the FC exit might come under that category.

regards

Taffy

check my gallery for a dodgy endcap didn't loose any tourque with the stock cam/valves / 628

I tried an akra though and it killed the nice bottom end, top end was stronger and delivery more lumpy.

with the x-2, bigger valves and the 105mm piston its all differernt again and likes the akra.

Barrett make a good one. I put one on the 390 a few rides back.

Cheers guys. there seems to be a few options, and I am being pure lazy not building one myself.... but, going back to Taffys post that there is only 3/4 hp difference between restricted and free flow then I wonder why I would bother at all. How many people really NEED more power than a well fettled 650 already puts out unless you got a big *** desert out back, or a large size flattrack etc....... certainly not the people gearing there bikes down aye. I stooped riding my 650 in the trees and paddocks coz the space seemed to shrink eveytime i opened the throttle.
There are obviously bigger gains to be made in other places if HP was my game, but trying to put 60 od HP through a 120mm tyre onto gravel (public roads) is more fun than a ferret down ya pants anyways.
And yeah I know only too well that NEED has nothing to do power...... its all WANT (remember I ride a Berg too)

Probably the most compelling reason for myself to change my end cap would be to produce that lovely baritone note instead of my singer sewer sound alike. Time for some more workshop time methinks.

Procrastination keeps me sooooo busy.

its worth doing, the endcap mod, a little of each smoother delivery nicer tourque and a sweet sound

just for a laugh take the wole endcap assembly off and see how loud it is, the pipe through the middle is still supported

Seems some things are universal amongst petrol heads aye?
In my misspent youth I used to remove the baffle from my Z1000 4-1. It had a 4 inch tube with a baffle insert that was just begging to be removed for the 20 min trip home from work @ 3 am. I thort it was music (neighbours wanted to kill me)...... Ive grown up a lot since then, now I fire them up at 7am on a sunday morn......
Truth be known I discoverd you can get away with all sorts of stupidity if people cant hear you, so some of my bikes I run quiet, but sometimes you just gotta make a noise, so I got the odd noisey one too.

I was going to see if i could track down an old fc insert to save the hassle of building/ sealing the end cap but I have had to fabricate worse in the past so I had best stop being lazy and get creative.......

Bushiebro... wot size tube have you used for the perf section, same as the perf tube in muffler? or did you step it down one size to slide into original muffler?
Is the curve for noise reduction or just to get tube to line up with exit hole? (looks like the new section of pipe I build could run straight to the end cap without a curve (I'm gonna build a new end cap so am not reliant on an existing hole to line up with)
Cheers 4 your input bro....

it fits over the perforated tube , measures about 45mm ID

youre right the bend is just to line it up as the perforated tube inside is right up at the top of the can.

Sorry to re open this topic, but I am looking for an endcap for my FE550.
Are these "high performance" endcaps still available?
I put some new rivets into my exhaust and blew the endcap doing 140 km/h...
Maybe the heatwrap I used on the frontpipe has something to do with it.
So if anyone has something lying around, or has a link for a site, I'd be pleased.