Tech specs for 250cc MotoGP replacement

[MrKipling43]

Interesting... particularly the engine sale reg.

http://www.crash.net/motorsport/motogp/news/172613...

[paranha]

A great idea--perhaps the engine sales should be implemented in F1 to keep costs down.

[rah1888]

Very interesting.... thanks for posting it up.

Are they keeping 125cc races? It's becoming my favourite, particularly with the current British interest!

[MrKipling43]

rah1888 said:

Very interesting.... thanks for posting it up.

Are they keeping 125cc races? It's becoming my favourite, particularly with the current British interest!

As far as I know they are, with no change I think.

[rah1888]

MrKipling43 said:

rah1888 said:

Very interesting.... thanks for posting it up.

Are they keeping 125cc races? It's becoming my favourite, particularly with the current British interest!

As far as I know they are, with no change I think.

Excellent news. Hoping Bradley continues improving next year & Scott Redding gets a better bike.

[MrKipling43]

rah1888 said:

Excellent news. Hoping Bradley continues improving next year & Scott Redding gets a better bike.

Yeah it's great to have Brits coming up through the Prototype ranks rather than having to break in via superbikes, which is so much harder.

[SamHH]

Why will four-strokes be cheaper?

[MrKipling43]

SamHH said:

Why will four-strokes be cheaper?

Presumably they're less highly stressed and a lot easier to get the same power out of.

[SamHH]

Why is a four-stroke engine less highly-stressed than a two-stoke engine?

[MrKipling43]

SamHH said:

Why is a four-stroke engine less highly-stressed than a two-stoke engine?

Like I said, just guessing. Although I would have thought that it's a lot easier to get 150-160bhp (that's what the 250s get isn't it?) out of a 600cc four-stroke than a 250cc two-stroke.

[DrTre]

Always thought power was easier to get out of a 2 stroke for a given capacity...two power strokes per revolution compared to a four stroke.

Perhaps they mean "cheaper" in the sense that 2 strokes for bikes are no longer produced so it's a bit of a dead end development-wise whereas they can pilfer technology from elsewhere in the pursuit of the 600 four stroke...with a more direct marketing link to what is on sale to the public.

Edited by DrTre on Thursday 11th December 19:59

[SamHH]

MrKipling43 said:

Although I would have thought that it's a lot easier to get 150-160bhp (that's what the 250s get isn't it?) out of a 600cc four-stroke than a 250cc two-stroke.

Given that 990cc four-strokes outperformed 500cc two-strokes, you'd have to say yes, but that won't make the manufacturers say "ooh look, we can get just as much power as before without stressing the engine so much"; they'll say "ooh look, we can get loads more power with the same amount of stress on the engine". I can see that some of the other regulations might reduce costs (rev limits etc.), but not the four-stoke bit. Maybe it's for another reason.

[MrKipling43]

SamHH said:

Given that 990cc four-strokes outperformed 500cc two-strokes, you'd have to say yes, but that won't make the manufacturers say "ooh look, we can get just as much power as before without stressing the engine so much"; they'll say "ooh look, we can get loads more power with the same amount of stress on the engine". I can see that some of the other regulations might reduce costs (rev limits etc.), but not the four-stoke bit. Maybe it's for another reason.

Very good points, perhaps it's parity with manufacturers lower spec road bikes...

"Look, even if you can only afford a 600, you can still pretend you're a GP rider."