BSA SCRAMBLER

Not too bad for a bit of fun I suppose
I'm not a lover of the exhaust wrap
And a victoresque paint job or a b50 MX paint job would be better
And a hinkley triumph monobloc
After all it's all about style?
 
What is the wrapped exhaust pipe all about? When did this start?
 
Of course , sorry for my slow wit ! I have a pair of bib overalls from work I use got to turn them up , haha! …. Not sure my DR650 a scrambler , Suzy call it a dual sport , handles good & quick , weight is 365 lbs or so great fuel economy and I understand how the thing works , very basic good bike , I can take it anywhere I choose to go with little problem …. oil cooled
 
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What is the wrapped exhaust pipe all about? When did this start?
Two purposes. Heat protection and supposedly to improve gas evacuation. Ceramic coating is a better alternative so it's purely aesthetics. Personally, i'd like it better with Titanium hi-risers
 
Couple of my rides. One a scrambler and the other a dirt bike.
 

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What is the wrapped exhaust pipe all about? When did this start?
Originally a racer thing.
2 benefits:
1. Keeps gases hot, hotter gasses have more volume, so if more volume goes through same space, it has to go faster. Gas velocity was therefore a reason for its effects on pressure pulses etc. But this clearly only matters in very specific circumstances.
2. Reduces radiated heat to other components so aids engine / oil cooling etc. This is mainly a benefit on fully fairerd bikes and also race cars and was the main reason I used to wrap race pipes.

It can also reduce noise by a db or 2, which can be a big benefit on a race bike struggling to meet the noise limits.

As Baz said, it’s now a hipster styling thing whereby exhausts are wrapped for no actual reason or benefit at all, apart from styling, and that in itself is ironic as it’s often badly done and looks sh*t !!

As far as I know, it was never a serious scrambler mod.

I agree with Baz ref styling on this bike, they’ve ignored / wasted an opportunity to style it inspired by past scrambler bikes and competition success. They cudda really leveraged this history with big black and white photos etc plastered all over the walls and website… like Triumph do so well.
 
Originally a racer thing.
2 benefits:
1. Keeps gases hot, hotter gasses have more volume, so if more volume goes through same space, it has to go faster. Gas velocity was therefore a reason for its effects on pressure pulses etc. But this clearly only matters in very specific circumstances.
2. Reduces radiated heat to other components so aids engine / oil cooling etc. This is mainly a benefit on fully fairerd bikes and also race cars and was the main reason I used to wrap race pipes.

It can also reduce noise by a db or 2, which can be a big benefit on a race bike struggling to meet the noise limits.

As Baz said, it’s now a hipster styling thing whereby exhausts are wrapped for no actual reason or benefit at all, apart from styling, and that in itself is ironic as it’s often badly done and looks sh*t !!

As far as I know, it was never a serious scrambler mod.

I agree with Baz ref styling on this bike, they’ve ignored / wasted an opportunity to style it inspired by past scrambler bikes and competition success. They cudda really leveraged this history with big black and white photos etc plastered all over the walls and website… like Triumph do so well.
HIGHLY TUNED Two stroke engines, hot pipe vs cold pipe, have significant scavenge efficiency differences.
Ceramic fiber insulation on the entire expansion chamber is the norm on many production two strokes.
 
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