No8 Wire Extraordinaire
Well a busy weekend, I got the manifold plasma cut & tacked it on & after 3 attempts got it in the spot on position & didn't need to grind it at all. Then with some pretty average welding skills connected it just fine. Tried the bodywork on so all good. 27.1hp at the rear wheel @7800, was hoping for over 30 but there you go, maybe I could polish the inlet trumpet..
Don't you look at my accountant.
He's the only one I've got.
Forum whore
My thats very impressive I guess thats a BMEP of about 190psiOriginally Posted by F5 Dave
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Forum whore
and... the lighter I get the faster it goes!
I Like your project Dave. what do you think it will tip the scales at when its finished?
I'd like to fit something in a rs125 chassis, an fxr150 of course.
Dave/Kirk what year did they change the rs chassis to the larger ermmm chest cavity?
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In the riders seat
95 ( I think)
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
No8 Wire Extraordinaire
Def 95 & that is why the jump in price.
ok I'm feeling guilty already (gee I'd suck at poker), time to come clean, power claim is a total lie, the clues were that it is .1 higher than the wildest claim I've heard & more so that it is at such garden revs.
No where near the dyno yet, I can't rivet the flywheel yet, can't risk the impacts on my arm, but it should run once that's done, then I will have to fix the jacket water leak & then I'll dyno it to see that I'm in the right direction, but I'll only be in the low 20s with that pipe, there is plenty more I need to do yet.
I should weigh it I suspect 70-75kg if my 50 is 60& a bitkg (it was lighter in the RG50 frame so shut the fuck up anyone still wibbling on about RS frames).
Don't you look at my accountant.
He's the only one I've got.
Forum whore
At that power to weight its going to be awesome!
I just like the idea of the entire rolling RS chassis package, suspension thats made to go fast! mmmm i did try fitting a fxr in an rg50 frame, ermmm not much room there!
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now where's some dirt!
If it can fit a CB125 then it can fit an fxr, surely?At that power to weight its going to be awesome!
I just like the idea of the entire rolling RS chassis package, suspension thats made to go fast! mmmm i did try fitting a fxr in an rg50 frame, ermmm not much room there!
bucket blingster
I've seen XR200's in RG50 frames, but an FXR motor has a way bigger head/cam area than one of those.
No8 Wire Extraordinaire
Yeah 50 motors really are mucho smaller than anything else (unsurprisingly).
Don't you look at my accountant.
He's the only one I've got.
Forum whore
As a matter of interest.....Brake Mean Effective Pressure....Engineering Term & Method of Comparing Different EnginesMy thats very impressive I guess thats a BMEP of about 190psi.
BMEP-PSI = Average Cylinder Pressure in PSI
Two Stroke -- BMEP = HP x 6500 / L x RPM
Four Stroke -- BMEP = HP x 13000 / L x RPM
L = Displacement in Litres (80 cc = .08 Litres) (700 cc = .7 Litres)
So 27.1*6500/0.125*7800 = 180.7
BMEP of a 27.1hp 125 at 7800rpm is 181psi. So 190psi was not a bad guess Bucketracer.
As a BMEP of 200psi is super race territory I guess Bucketracer was playing along with your joke.
BMEP can be used to evaluate power claims be it at 7500rpm or 14,000 and 4 or 2-stroke. Most air cooled 2-stroke engines will be lucky to better 135psi and water cooled 160 or so. A Honda RS is about 160 and F1 4-stroke race engines manage a bit over 200.
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Forum whore
yes mate. As I remembered it, I gave you a crank seal the day before. Never got it back though...
No8 Wire Extraordinaire
What the heck you talking about?
Wrong bloody Dave again pencil dick (term of endearment)
[edit] looked back old posts on page 1. Ahh right Dave then.
Crank seal?
ahh you mean for the RG? Did I? oops. I'll buy you a beer next time you're over. 2 even.
Don't you look at my accountant.
He's the only one I've got.
Very controversial
ive talked to keith biddle about doing that, he knows his rs125's and he said it is possible but modifications to frame and that very inconvenient cross bar they have would be nessesary. it wouldnt be cheap and maybe its abit too much work for a little 150.....and... the lighter I get the faster it goes!
I Like your project Dave. what do you think it will tip the scales at when its finished?
I'd like to fit something in a rs125 chassis, an fxr150 of course.
Dave/Kirk what year did they change the rs chassis to the larger ermmm chest cavity?
chuck norris's calender goes from march 31st to april 2nd
No one fools chuck norris.......
No8 Wire Extraordinaire
Update!!
erm; No
No is the answer.
but I've borrowed one.
I'll make a start on it late next year in time for that GP
Don't you look at my accountant.
He's the only one I've got.
Forum whore
Maybe you are thinking of mine. It was a dark blue 1987 Rs125 twin shock chrome moly tube frame with an h2o Tf100 donk. I raced it at one of the Ohakea GP's (dfn due to the shit rider being unfit although i had just finished 3rd in the 50GP behind F5Dave who still owes me a crank seal...) and raced it a bit at Mt Welli before some C%*T from Pukekohe stole my trailer with it and my 50. I got bits n pieces back and went on to build my current bike.
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