increase torque/low-end power with muffler? ideas/criticism

[blurredman]

With that welding work between the frame, and the big tyres on.

Would there be enough room for the rear wheel to use the suspension to it's full potential, without the tyre hitting the frame?
____________________
CBT: 12/06/10, Theory: 22/09/10, Module 1: 09/11/10, Module 2: 19/01/11
Past: 1991 Honda CG125BR-J, 1992 (1980) Honda XL125S, 1996 Kawasaki GPZ500S.
Current: 1981 Honda CX500B - 91k, 1987 MZ ETZ250 (bored to 295cc) - 38k, 1990 MZ ETZ251 - 49k, 1979 Suzuki TS185ER - 9k, 1973 MZ ES250/2 - 17k.

[bevlak]

[Riejufixing]

[-]

[bevlak]

[Ste]

One niner?

[BusterGonads]

There should be a special scrapyard in Hell for people who cut up great little bikes like these and really fuck them up with mad ideas. The facebook groups for these bikes are full of plaintive cries for help from lads who bought these bikes which won't run properly because the carburation is all messed up on bikes they usually paid well over the odds for based on so called stylish, so called Cafe Racer appearance. They are also usually dogged with electrical problems. Often the people messing them up are lads just like I was in 1969 who don't know what they don't know and somehow, filled with youthful arrogance, think that Honda got it all wrong because someone at college told them you can get a CG to do ninety miles an hour by ripping out the battery, the airbox, sticking a slab seat on it that will give you gangrene in the arse if you ride it for two hours, and putting a pod filter on it. Worst of all, the donor bikes probably only needed a good service and a few worn out bits replaced such as chains and sprockets and would have given another forty thousand miles of good service with complete reliability if they were just ridden and serviced with decent oil every thousand miles.

[bevlak]

Ok this is a nightmare. Thanks to everyone who actually helped and goodbye to everyone who didn't. I'm out.

[RhynoCZ]

[stevo as b4]

Though the effect is the same, (well as same as a four stroke and two stroke comparison can be) YPVS is a little bit more complicated in implementation than you describe.

[RhynoCZ]

[-]

[Old Git Racing]

Listen mate, do what you want to do. You won't get much meaningful advice or criticism on here, just the usual load of shite from the same old same olds who love to put anyone down.
I don't know if what you are proposing has merit, but plenty of manufacturers like Akropovitch make a good load of wodge from doing what you're proposing and improving a bike by experimenting with the exhaust, if youve got the time and means try a few things.
When we all talk about 'is this forum dying' I despair when I see someone come on asking a genuine question about something related to a bike and performance and for it he gets advice on tractor tyres and hipster beards and generally flamed by people who are more comfortable behind a keyboard than in a garage actually doing it.
Do something and let us know how you got on, improve? worse? its all knowledge.

OGR.
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2022 Tiger Sport 660 2019 Street Twin 2003 K3 gixxer 1000 1998 Srad 600 track hack

[Ste]

nobcat.jpg

[BusterGonads]

Old Git Racing said -


"I don't know if what you are proposing has merit, but plenty of manufacturers like Akropovitch make a good load of wodge from doing what you're proposing and improving a bike by experimenting with the exhaust"

I think they are engineers with knowledge, expertise and test equipment.

[Old Git Racing]

Not to start with they weren't, but why diss the guy for trying?

OGR.
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2022 Tiger Sport 660 2019 Street Twin 2003 K3 gixxer 1000 1998 Srad 600 track hack

[bevlak]

[stevo as b4]

I'm sorry but I still don't buy that you're going to improve overall a given 125cc engine with your magic baffle.

Im a stubborn cunt, and if I wanted to experiment with and move the torque peak up and down the Rev range on a given bike with exhaust system tuning, I'd rent a dyno cell for a week and make 10, 20 variations of exhaust system to see and log/prove what is happening. I'd want to see my theories proved or disproved in front of me on a screen, instead of believing that welding in a bung to my bikes exhaust has made it better.

Im also one of those people who doesn't have a magic butt dyno that can detect 0.2bhp more or less from riding the bike, and first guess spot on jet sizes to suit. There's plenty of people out there who can though from what I read everywhere.

[Riejufixing]

[-]

A classic case of perceived "style" over substance.
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TZR250 2MA road, TZR250 1KT road, TZR250 2MA race, TDR250, YZF-750R Boost colours.
Jaguar S Type 3.0 V6 Sport R, VW Transporter T5 GP LWB Shuttle 140ps DSG.

[BusterGonads]

[BusterGonads]

[RhynoCZ]