hay guys wtf is this bike

[realmenride50s]

check this bike on ebay Item number: 380046055649

 

[I_THUMP]

Whats with that exhaust? Thats for a 2 stroke lol. The frame looks very thin, I would like to see the bare frame of it

Oh and heres the link to save everyone from having to search it

SRM110 ELECTRIC START PITBIKE KTM LOOKALIKE THUMPSTAR - eBay Other Trail Bikes, Trail Bikes, Motorcycles, Cars, Bikes, Boats. (end time 23-Jul-08 17:20:18 AEST)

 

[unit_mx]

The expansion chamber is fake , there is a pipe than runs inside it. Sean that runs dirtpro's used to race a ktm 250exc , so the bikes cant be too bad. Kinda gay though because he had an exc and now he sells crappy stm's

 

[pbk]

ive seen that before wat would happen if you put an expansion chamber on a 4 stroke

 

[sus1]

It Would Blow The Fuc Up!

 

[I_THUMP]

The expansion chamber is fake , there is a pipe than runs inside it. Sean that runs dirtpro's used to race a ktm 250exc , so the bikes cant be too bad. Kinda gay though because he had an exc and now he sells crappy stm's

Thats just wrong having a fake pipe on it

 

[Hollis]

why would u even do that haha id just take it off and put it on my pushbike

 

[quincy]

hey. just out of interest y dont four strokes run expansion chambers?

 

[1fifty1wheel]

hey. just out of interest y dont four strokes run expansion chambers?

there is a full tech answer that someone may put up but heres the simple one.

2 strokes run use a reed valve instead of a cam driven valve, reed valves require some degree of back pressure to hold/help them shut. the expansion chamber allows maximum flow with the most efficient back pressure and its size and design is tuned for best results.