Allspeeds vs TSA Pipes

[Deleted]

didn't do that much mileage tony about 2,500 miles at a guess

[muttsnuts]

Hi Tony I agree, however, I have done a full exhaust test on 10 different exhausts and they where all done on the same day, on the same bike (mine) and the bike was never removed off the dyno after baselining and the difference between the exhausts was very similar, if it had been vastly different then I would not have posted it up TBH because of the every reasons stated

In respect of Mick's bike, I am a little puzzled and it would be good to get to the bottom of it, but right now I don't have the time or space and I am not so sure Mick would want to pay me my time trying to source the issue, but I could be wrong !

It needs a careful checking over, the obvious checks as stated before have been done and its all fine, I've just fixed an RD400E that had a similar issue and I went through all of the checks as per normal and did allsorts of things, that turned out to be a very slightly leaking crank seal, you would have sworn the fault was electrical (low/high coils) as it would only do it under load and at certain rev's, but it wasn't, I spent hours checking and testing, eventually found it but not before I'd swapped all the electrics, carbs several times and set everything up god knows how many times

[gibsonexhausts]

Try it with the Allspeeds back on the bike. Then if it does you have a problem that needs fixing. If it doesn't then bingo it is just down to the change of pipes. Would be the quickest and cheapest way of fault finding.

[copper99]

Feb 26, 2014 13:10:58 GMT 1 gibsonexhausts said:

Try it with the Allspeeds back on the bike. Then if it does you have a problem that needs fixing. If it doesn't then bingo it is just down to the change of pipes. Would be the quickest and cheapest way of fault finding.

Yeh, ill sell them back to you Mick...

Actually, I wouldnt , I love my Allspeeds and wouldnt part with them for any pipe, they just look and sound right, if I want to go faster , ill get the GSXR out.

Thread has been a great read thou, I would have loved this detail back when i had my original in the 80s.

[muttsnuts]

sorted out the programable ignition and made a short loom up that negates the need to chop any wires so I can test any bike with the unit now, so once I've done some initial testing, assuming its all positive and I still have Mick's bike here I might just run it up with it connected to see what it does - it replaces the CDI and low/high coils, so its a nice quick way to eliminate these now and on an LC its a very quick job to unplug and plug this unit in

[Deleted]

if you don't mind trying it dave I have no objecions

[higgsy]

We notice a difference in runs from morning to afternoon, air temp, humidity etc. I think to get a truley accurate back to back test it needs to be as close as possible timewise. Not knocking anybody, just an observation. A lot can happen to a bike in a season. One of our TZR's seems to have lost some run on and gained some midrange for some reason? Only thing that's been changed are the pistons, perhaps the compression and squish has changed slightly, although the pistons measured up the same.

That is a strange curve from the TSA pipes compared to what's been posted before, but the allspeed one looks correct. Bit odd for sure.

We have a bike in YPM's (350) that refuses to work on anything other than cigar F1 stock pipes, even a set of Allspeeds dropped the power and they work well on anything! Some bikes seem to prefer a particular set of pipes for some reason and there is no rhyme or reason why

Mutts point about the crank seals is a good one, it's something that gets overlooked when there is an issue. I don't normally have much trouble with lab seals, although I've seen some iffy looking pattern ones, there isn't an awful lot to go wrong as long as the center bar hasn't been rubbing on the seal, the outer seals can leak especially on the timing side if the crank web is worn, it's easy to damage the inner lip if you are not careful with assembly.

[muttsnuts]

agree, its always best to do tests back to back, which is why the exhaust test I did last year was so telling as that was all done in the one day on the same bike - which was never altered or touched after the initial baseline, which is why looking at the results I am reasonably happy with as they do follow what we saw last year.

In respect of Mick's I agree its a little odd, he is picking it up today and will give it a test ride, I am sure he will be pleased with it as it goes very well, when the weather gets a little better and John and the dyno aren't so busy then I'll look to get it on there again with the programmable ignition and see if we can improve things.

I am building another engine at the moment, if that works then I think Mick is looking to have one of those put into his bike anyway, in which case it will be a good time to investigate the cause of this odd power curve, bike still goes well so I'd say be happy with it for now and just get it ridden !

[Yogi]

I still think Allspeeds are the best looking and sounding pipes on a 2 stroke,small cans especially,just my opinion
Be visiting Gibsons soon for some small cans for my next hybrid and I'm only a couple of miles away,,happy days

[guiri]

funny but my f2 is very asmatic in the top two gears.. its not been on a dyno so no proof..but can feel it..
with stock or micron pipes..
and only has 11k miles from new.
perhaps i expect a bit too much from it..but struggels to top to 110 mph.. and yes i do kane the ass off it.

[marsbar350]

Feb 28, 2014 23:23:31 GMT 1 guiri said:

funny but my f2 is very asmatic in the top two gears.. its not been on a dyno so no proof..but can feel it..
with stock or micron pipes..
and only has 11k miles from new.
perhaps i expect a bit too much from it..but struggels to top to 110 mph.. and yes i do kane the ass off it.

needs a decoke john