Kawasaki Sportsbike Riders Club - Australia - Online Forum

I found this on another site and thought it would interest some. Hope it isn't a repost.


http://www.superbikeplanet.com/2008/Feb/080204b4.htm

I just gotta hear the screamer

robracer wrote:I just gotta hear the screamer

Didn't you say that in the other thread about this????

photomike666 wrote:

robracer wrote:I just gotta hear the screamer

Didn't you say that in the other thread about this????

Yeah but I just gotta hear it in the flesh Ive never heard or seen an engine with that firing configuration I just gotta get me some cause im drooling all over the keyboard

robracer wrote:

photomike666 wrote:

robracer wrote:I just gotta hear the screamer

Didn't you say that in the other thread about this????

Yeah but I just gotta hear it in the flesh Ive never heard or seen an engine with that firing configuration I just gotta get me some cause im drooling all over the keyboard

go out to your garage start up your Z, or the 10 and rev it. then you have heard a screamer

Wattie do you know what we are talking about?

screamer meaning it fires 1-2-3-4.

not 1-2....3-4 like the current 800's.

the 990's and 800's fire 2 cylinders at a time to give the tyre a chance to recover frm each thump.

screamer is 1-2-3-4 all evenly spaced, they say it makes more top end, but the lack of traction can be combatted with traction control.

your 10 fires 1234 does it not?


Ducati, only about 2 months before their 1st 990cc race, had not decided on a screamer, thumber or half/half. they ran with a half.half, 1..2....3..4
Kwak arent really ahead. they are just the 1st to do it to a 800 and test it at the track.

Looks like you do, wish my 10 engine looked like that now back to those pictures the engine is something else, no wonder it had ppl scratching their heads

Doesn't the standard firing order go 1,2,4,3 - I think to help balance the crank?

photomike666 wrote:Doesn't the standard firing order go 1,2,4,3 - I think to help balance the crank?

That is correct my Z750 & the Z1000 is ..... wait for it .....1243

1-2-4-3 Valve timing: Inlet Open 38° BTDC Close 66° ABDC Duration 284°

robracer wrote:

photomike666 wrote:Doesn't the standard firing order go 1,2,4,3 - I think to help balance the crank?

That is correct my Z750 & the Z1000 is ..... wait for it .....1243

1-2-4-3 Valve timing: Inlet Open 38° BTDC Close 66° ABDC Duration 284°

yeah you know what i meant, 1 fires at a time, evenly spaced

motorcycle technology has progressed at an incredible rate since 1972.........and the Z1 kwakka.....

its firing order was 1-2-4-3, as is *every* 4-cylinder Jap bike made since, well, the first Honda 4 !!!!

Z1 - Inlet timing open 30deg BTDC, close 70 deg ABDC, duration 280 deg.....not that much difference to a late-model Z1000 really is there.....

anyone old enough to remember the *infamous* Waggot 30/70 cam in a Torana red motor ?? these were the ducks guts back in the day.... (and identical in timing figures to a stock Z1 camshaft)

Gosling1 wrote:anyone old enough to remember the *infamous* Waggot 30/70 cam in a Torana red motor ??

Combined with a Yella Terra head and a set of triple 1 3/4" SUs .... and no, I'm not that old, I just lurved my Toranas.

Is it just me , but I can't see where the exhaust ports are! Are they supposed to come out in front?

I was also wondering if it's possible to have a 'big bang' screamer? That is, irregular firing order that still revs really high?

http://www.youtube.com/watch?v=bjou0zRJZBE

Ant West on the screamer, don't think this has been posted yet, not that i could find anyway. it's a short clip but sounds unreal.