72 at the rear wheel I see, did'nt bother to read all the drama that went along with the add. That would mean not far off 80hp at the crank yes?Originally Posted by F5 Dave
So why are you impressed with your motor?
The TV collector.
72 at the rear wheel I see, did'nt bother to read all the drama that went along with the add. That would mean not far off 80hp at the crank yes?
So why are you impressed with your motor?
No8 Wire Extraordinaire
A well tuned 350 should do 70hp. hence a big $ 421 should do much better so I'm not impressed with 72hp.
My latest 350 was supposed to, felt pretty fit but never dyno'd it before I converted it to 496.
Don't you look at my accountant.
He's the only one I've got.
Hardcore Biker
Yeah but by all accounts, 70hp is kinda peaky.
Maybe he's gone for a good spread of power and torque, for rideability, as opposed to outright numbers?
Obey the hosebeast
Yeah, but 100,000rpm. Imagine the noise...
Jesus built my Gixxer
Have you got any pictures of this bike and what price?
Built for speed, not for comfort
No8 Wire Extraordinaire
Yeah my GS1100 was ~ 70hp & that was peaky. oh hold on, maybe it wasn't. 'By all accounts'
ok with the 421 maybe he did tune for midrange, but I know how they are ported & you should get mid & more power. Or tune for top end & get much more. My 496 is tuned for mid but with bigger carbs etc they get 115hp no problem.
Don't you look at my accountant.
He's the only one I've got.
Hardcore Biker
Smart ass...Yeah my GS1100 was ~ 70hp & that was peaky. oh hold on, maybe it wasn't. 'By all accounts'
When did a GS1100 come into a 350 2-stroke conversation? If you are going by that logic, you may as well add Harleys to the list...
No8 Wire Extraordinaire
Its my stock & trade.
That's a pretty hot Hardly to be making 70hp.
My point was why does a big bore 350 or any 2 stroke have to be peaky just because it makes 70hp?
TZ250s can make 80 no drama & they still aren't peaky, - ok they aren't bulging with midrange, but I resented the implication that it would have to be 'peaky'. Tuned properly a 2 stroke can make better midrange that a 4 stroke. Emphasis on 'properly' of course.
Don't you look at my accountant.
He's the only one I've got.
Hardcore Biker
I said by all accounts, because I've heard of a few RZ's ported and tuned, which were more peaky, than have a spread of power. I personally haven't ridden one of that tune or power...
I'd gladly take up the offer to ride one like that, lol...
PS: You may not get it back...
Moped rider
You talking to me?
It's not really for sale, UNLESS you have an RZ350 motor for part exchange, 'cause I still want to do the TZR350 thing, but if you want to put $1500 in my hands I'd think about selling it. PM me with an email address for pictures.
Hardcore Biker
There are a few differences between a TZ and an RZ350, besides 100cc.
RZs have narrow transfer ports, with limited port time area on the transfers. This has always been a problem with them, and is oen advantage of the v twin TZ/TZRs and RGs
THey also run comparatively small reed cages (but bigger than the LC but smaller than modern stuff) with (as stock) 26mm VM roundslide carbs, so pretty small. A comparatively heavy crank, with a flywheel and charging system limits things as well.
An honest 70bhp RZ is a grenade.
A road going TZ would be fun, except for the top end rebuild during lunch halfway around the COrro loop everytime you took it out.
Geoff
(\_/)
(O.o)
(> <) Peace through superior firepower...
Build your own dyno - PM me for the link of if you want to use it (bring beer)
No8 Wire Extraordinaire
I've had a decent gander around a couple of late model TZs (actually now I think of it late model implies ~ 3yrs & they were older than that, but not by too much), so I am aware of the design of both & the differences. But I don’t agree that a 70hp RZ has to be a grenade. They will run all day & night on mid 50s tune with std carbs & pipes (my first one did). But add some decent pipes, some pwk carbs with bigger 6 petal reedblocks, decent ignition & some serious port-work & 70 is well obtainable without having to raise the revs too much & becoming a bomb.
But if you want bigger power easier a stroked crank & a Cheetah top end gives you much much wider transfer feeders (they make as a monoblock so the inside transfers can almost touch with only a thin piece separating them). Ideally they would sweep further, but it is an improvement. The reedblock is a dirty great CR250 block with manifold to suit & 35 or 39s will go nicely with that. 13 port nickasil barrel with RAVE type PVs. I’m sure you’ve seen all this around on other forums.
Don't you look at my accountant.
He's the only one I've got.
Come warm yourself by the fire
Yep a well worked PV definitely adds some "peaky" to the bike.
Just the same as a well worked VVT system adds decent peaks.
I still cry in my pillow at night over losing my RG.
The RZ was fun........but the RG was dangerous
Reactor Online. Sensors Online. Weapons Online. All Systems Nominal.
No8 Wire Extraordinaire
The idea of Powervalves is that they extend the range the engine is tuned to. Some simple PVs are 2 step like the RZ, although there are kits to change that. TZs are continuous, so are centrifugally operated ones like on MX bikes or pressure ones like RAVE style.
This should mean that bikes have a wider spread of power compared with non PV type. Of course small cc bikes will always be compromised on mid or low end so feel peaky.
VVT has not really been anywhere near as successful if you champion F-ups like the VFR800, maybe there are better systems, but who cares about diesels anyway?
Don't you look at my accountant.
He's the only one I've got.
Forum whore
my RG 400 puts out 70hp and is more rideable than the import slugs that have 59hp.its all in the carburation and breathing.it has a better midrange than a lot of 600cc fours and wops F3 SV 650's at every trackday we have at ruapuna and levels(dont forget the RG weighs about 140kg).it can be done with careful set up,and most 2T engines suffer because they run too rich, to stop dickheads seizing them.One of the best days of my life was trying to follow Jay Lawrence down the straight at Teretonga riding a mates RS 250 Honda.Jay was on my RG.i couldnt catch him.yeah i know hes a great rider,but there is a certain satisfaction gained from watching someone else riding your bike really well.who needs four strokes,life doesnt get much better than that.
"more than two strokes is masturbation"
www.motoparts-online.com
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