Who said aftermarket cans don't improve 250s?

[onearmedbandit]

Sitting on 100km the revs drop about 800rpm in that weather.

Did you change the gearing on cold early mornings as well? Because that's the only way you'll see any change in x revs at x speed.

[steelestring]

true that..... what about weight savings? those standard pipes weigh a bit too eh? Compared to a aluminium one peice?

[enzedone]

No gearing change. Another thing I notice is coming home from work, more traffic, more wind from all the cars/trucks seems to knock the bike around as well, making it work harder.
Original pipe compared to the carbon slip-on.....unreal!

[onearmedbandit]

No gearing change. Another thing I notice is coming home from work, more traffic, more wind from all the cars/trucks seems to knock the bike around as well, making it work harder.
Original pipe compared to the carbon slip-on.....unreal!

Sorry, that was tongue in cheek. The revs your motor does as a certain speed is solely dependent on gearing, from internal ratios, primary drive and final drive ratios, and overall tyre circumference. The amount of power your engine makes has no effect on gearing, so how you seem to notice an 800rpm drop just from different ambient air temp perplexes me.

[Miscreant]

Sorry, that was tongue in cheek. The revs your motor does as a certain speed is solely dependent on gearing, from internal ratios, primary drive and final drive ratios, and overall tyre circumference. The amount of power your engine makes has no effect on gearing, so how you seem to notice an 800rpm drop just from different ambient air temp perplexes me.

I fear you lost him again.
I love it when people feel the need to share their stupidity with us on the Internet for all time.

[motorbyclist]

I must say that this is correct. I'm no mechanic, and I'm only riding a 250. But leaving home at 3.30am and riding down the motorway towards Albany, there's a really nice cold spot, and the bike seems to run way better. Sitting on 100km the revs drop about 800rpm in that weather.

:slap:

you'll find that simply isn't the case unless the clutch is normally slipping and the cold spot causes it to engage...... what you may find is the engine speed picks up, causing you to back off the throttle to maintain your speed... alot like cresting a hill

Another thing I notice is coming home from work, more traffic, more wind from all the cars/trucks seems to knock the bike around as well, making it work harder.

:slap:

are you splitting between two oncoming lanes of traffic?

travelling in their wake actually helps you, even if it can buffet you around a bit which makes is a bit more tiring as a rider - heck I got my little 100cc honda up to 100kph while drafting behind a speeding milk truck! I also seized and broke a piston circlip it about 30 seconds later and totally ruined the motor lol

maybe you should look into getting a mentor....