NSR FXR, the new No45

[husaberg]

I like the single's. I would not fancy the extra 20kg of engine to lug around.

Err why not a 2 stroke then hehe....

I'm sure you guys know alot more about useful stroke lengths etc, but from something i did at my old work for a customer was stroke an R6 down to fit into F3, (billet machined crank) and it worked but the result (as i heard through the grapevine) was a stroke so short it made power that was difficult to make use of properly, apparently like a 2-stroke but less usable...

I think the crank was allegedly like $8000 as well ekkk.
metal sray would be a bucket affordable remedy for a mild destroke with the crank then ground offset like they used to do with the stroke BMC minis

Rich, Grumph as most know the sluggish combustion and resulting poor comp or or horrible shape are the main reasons........but to mention mismatch valve sizes port velocity etc.
But People also forget how little power those 4 cylinders 250 make at actual peak max revs...... they rev sure, but the max power is way way further back down the rev scale.

[richban]

I'm sure you guys know alot more about useful stroke lengths etc, but from something i did at my old work for a customer was stroke an R6 down to fit into F3, (billet machined crank) and it worked but the result (as i heard through the grapevine) was a stroke so short it made power that was difficult to make use of properly, apparently like a 2-stroke but less usable...

That would have been expensive. Thats why I like singles. So simple.

[richban]

Err why not a 2 stroke then hehe....

Only have factory support for 4 stroke engine builds.

[speights_bud]

That would have been expensive. Thats why I like singles. So simple.

Yep it sure was and i don't think we made much $$ on it at all after everything. (prob shouldn't say how much but it was a little less than 10k from memory )

[richban]

Yep it sure was and i don't think we made much $$ on it at all after everything. (prob shouldn't say how much but it was a little less than 10k from memory )

Holy fuck what a wast of dosh. Could build a nice super mono race bike for that almost.

[speights_bud]

Holy fuck what a wast of dosh. Could build a nice super mono race bike for that almost.

For sure, but this was supposed to be 'The next big thing' to rival the 600's modded to (Ozzy) 450 Triples that were just being turned out... The designer told him it wouldn't work, and he knows a few things about engines, he built the First Triple Rotor (In NZ at least), Don't know where the bike is now, last i heard Mr Van Boomer had it in his shed but that was a year or two ago now.

[husaberg]

Yep it sure was and i don't think we made much $$ on it at all after everything. (prob shouldn't say how much but it was a little less than 10k from memory )

Codgy printed how much it was (i think) if it was him it will be on his web site somewhere when he tested it assuming we are talking of the same bike....
the 10 could back been a misquote or the result of a failing memory i will have a looky.

Had a look and it seems i plucked the figure out of thin air whoops sorry. Good to know i are now starting to develop Alzheimer's as well.
http://www.glenwilliams.co.nz/articles-by-gw.html
i assume..............as your post says 10k mine 8k mmmm.... even with the eye roll it was a lot more that the $1600 odd to convert the ozzy engine as quoted still worth a crack i guess.....
i priced a billet somewhere from CHCH for the steel it was scarery actually it might be on another web site about a similar crank.........
maybe it was for the speedway v8 based on the 2 yams or what ever

[richban]

Codgy printed how much it was (i think) if it was him it will be on his web site somewhere when he tested it assuming we are talking of the same bike....
the 10 could back been a misquote or the result of a failing memory i will have a looky.

Had a look and it seems i plucked the figure out of thin air whoops sorry. Good to know i are now starting to develop Alzheimer's as well.
http://www.glenwilliams.co.nz/articles-by-gw.html
i assume..............as your post says 10k mine 8k mmmm.... even with the eye roll it was a lot more that the $1600 odd to convert the ozzy engine as quoted still worth a crack i guess.....
i priced a billet somewhere from CHCH for the steel it was scarery actually it might be on another web site about a similar crank.........
maybe it was for the speedway v8 based on the 2 yams or what ever

Spoz thats the cool thing about F3. So many different combinations of engine and chassis. Just like buckets.

[Yow Ling]

Down here Cams run an open 150cc 2T/ 250 4T class 250s are limited to 2 cyl max thats the rules no sneaky shit put in there to even anything up or fair play bla bla At the moment its mostly buckets and RG150s but should start to grow soon

[speights_bud]

Codgy printed how much it was (i think) if it was him it will be on his web site somewhere when he tested it assuming we are talking of the same bike....
the 10 could back been a misquote or the result of a failing memory i will have a looky.

Had a look and it seems i plucked the figure out of thin air whoops sorry. Good to know i are now starting to develop Alzheimer's as well.
http://www.glenwilliams.co.nz/articles-by-gw.html
i assume..............as your post says 10k mine 8k mmmm.... even with the eye roll it was a lot more that the $1600 odd to convert the ozzy engine as quoted still worth a crack i guess.....
i priced a billet somewhere from CHCH for the steel it was scarery actually it might be on another web site about a similar crank.........
maybe it was for the speedway v8 based on the 2 yams or what ever

The figure i put earlier is only a touch higher than the 'quoted' price i heard tossed around the workshop by the other Machinists i was working with so its ball park anyways.... Plus sounds like he had to add a whole bunch of computer stuff to make it work, first Dyno Run of 67hp as well so although I'm sure there was some improvement its an expensive build, considering he did it in 09' and my SV650 was 66hp when it was built in 03' according to the data sheet it came with...

We did a crank for a Speedway V8 too, it was the first one we did and god knows what that cost to make vs what was charged, a lot of the cost was absorbed as learning how to work with the new 5 Axis Turn mill my old work had just bought....

[Grumph]

The figure i put earlier is only a touch higher than the 'quoted' price i heard tossed around the workshop by the other Machinists i was working with so its ball park anyways.... Plus sounds like he had to add a whole bunch of computer stuff to make it work, first Dyno Run of 67hp as well so although I'm sure there was some improvement its an expensive build, considering he did it in 09' and my SV650 was 66hp when it was built in 03' according to the data sheet it came with...

We did a crank for a Speedway V8 too, it was the first one we did and god knows what that cost to make vs what was charged, a lot of the cost was absorbed as learning how to work with the new 5 Axis Turn mill my old work had just bought....

That shows the necessity of asking not just can you do it ? but have you done it before ?....here in ChCh both Bob Densem and Dick Chapman have made cranks for years. Auto Restorations are good customers for things like Vintage Bugatti cranks. Last time I visited Bob he had just done a batch of cranks for the Cologne Capris...V6 Cosworth.
with all due respect to the outfit you work for, a one man band is a better bet for one off stuff.

I read about that destroked yam and nothing I saw made me think he knew what he was doing.....

[richban]

I read about that destroked yam and nothing I saw made me think he knew what he was doing.....

Can't imagine ever wanting to chuck a heap of toque in the bin.

[speights_bud]

with all due respect to the outfit you work for, a one man band is a better bet for one off stuff.

I read about that destroked yam and nothing I saw made me think he knew what he was doing.....

I absolutely agree with you, this is one of the main reasons i do not work there anymore. The boss started trying to take on seriously expensive to build Helicopter parts etc just because he could and wanted to brag that he made aircraft parts to his mates at the pub... There was Negative margin in them right from the start but you couldn't tell him that because he's an arrogant prick

But like i said earlier the company designer who does know his stuff said yes **We-Can** but it won't perform very well and the customer chose to proceed anyway... He must have had a shiny new cheque book or something...

What the boss was like:
I remember one of the guys who worked next to me was given the model/drawing and quote for a job to supply 'X' number of some new parts. He was also given the invoice for the material and told to figure out how long he had to machine the parts & stay within the quote at the usual charge out rate $120/hr. As it turns out $14 doesn't leave much time for machining...

I did my apprenticeship there and wouldn't swap it for anywhere else given the opportunity, huge variety of gear both Manual and CNC. The only regret i have from moving companies is that some of the toys i play with now have one less axis on them, but apart from that I've never looked back!

[crazy man]

the old man and a other guy made a flat crank for a v8 years ago .found the pics for it the oither. will post if l can me bothered. all hand machined. we can is a friend of the old man's he has some cool gear there

[Grumph]

Rich - Looking at the dyno curves posted on ESE thread I'm impressed by how flat a torque curve it has and how long a power band...dare I say very like a Honda road bike....
I'm sure kev has optimised cam and head but IMO you can sacrifice some of that wide range for a better defined peak - at least on big tracks. Kev will probably have some ideas on a pipe to do this....
On Ruapuna and from what I'm told taupo too, buckets are pretty much a constant speed motor and can be tuned accordingly.