ex tz350-750-rgb500-rider

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howie43
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Joined: Sun Apr 22, 2018 12:28 pm
Location: chester-england-uk

ex tz350-750-rgb500-rider

#1 Post by howie43 » Fri Apr 27, 2018 1:43 pm

ive been up there with sheene roberts mamola in 1980s transatlantic went through some bad patches with money got a lot of knowledge experiance been building race engines from 11yrs old served time as aircraft tech wondered into other things and know ime here wanting build a special :smile:
recently bought rz500 engine which ime going to develop and build over next 2yrs
bought cnc mill -manual lathe and other equipment wanting to bring the 1980s back alive
any ideas that you want to put forward or information ime willing to get involved or help and think that i will be useful to this site
hey guys talke to me
steve mainwaring-howie mainwaring smart(son)no-43-bsb

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Jeff B
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Joined: Fri Nov 18, 2005 6:15 pm
Location: Wisconsin

Re: ex tz350-750-rgb500-rider

#2 Post by Jeff B » Fri Apr 27, 2018 2:20 pm

Welcome. What do you have in mind? A full race replica?

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Smoker
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Re: ex tz350-750-rgb500-rider

#3 Post by Smoker » Sat Apr 28, 2018 5:30 pm

Nice intro. Glad to have you on the site.

Also, not sure what your definition of "special" means.

Race bike, street bike, OEM sleeper, full one-off custom???

When you say you will be useful to the site - that's great! Again, not sure what you mean. More engine development, or making cool parts available, or...?

Interested in reading more about your plans/ideas. There are many extremely knowledgable people on this site (not me!) That can help you get familiar with the 500 engine and bike.

You bought a CNC mill? :smt023

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giron
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Re: ex tz350-750-rgb500-rider

#4 Post by giron » Sun Apr 29, 2018 2:19 pm

this site is in desperate need of someone like you
1991 3MATZR250SP
!993 3XVTZR250SP
1996 RGV250(Lucky Strike)
1994 MC28SP
1995 MC28SP
1996 MC28SP
1985 RG500(Walter Wolfe)
1984 IT490
1985 RZV500R
1985 NS400R
1985 NS400R
1997 VFR750
1992 FZR1000
RGV400
TZR500
TZR350
1990 RZ350
1971 Porsche911S

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ns86
Posts: 833
Joined: Sat Oct 30, 2010 9:46 pm
Location: ontario canada

Re: ex tz350-750-rgb500-rider

#5 Post by ns86 » Sun Apr 29, 2018 11:49 pm

Welcome aboard. Your expertise should be beneficial to the forum, absolutely.

Giron Said:
this site is in desperate need of someone like you

I'm sure you will find quite the opposite to be true. Plenty of experts here, myself excluded.

As to your question. Current avenues being pursued in devloping the engine are primarily the Top Case Modification to alter the induction to be the same on front and rear barrels, the Dry Clutch Modification, custom frames and cylinder conversions from TZ, YZ and RZ variations among others.
1985 RZ500
1986 RG500
1986 RG500 C
1992 RGV500 WW ATR
1992 RGV500 LS
1985 NS500 Spencer p
1989 TZR500 Biaggi p
1984 RZV500 Rainey p
1994 NSR250sp R
1983 NS250 p
1987 RG250 WW p
1983 RG250 p
1988 YSR50 p

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giron
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Re: ex tz350-750-rgb500-rider

#6 Post by giron » Mon Apr 30, 2018 12:21 am

as for myself. I can't weld. I can tell what the components of the engine are. I can't machine a part. I had for the last few years someone on this board swap swingarms and swap steering stems for my many projects. I know what parts will be required to complete to do a proper swingarm conversion. I see it as a flow chart when you are writing a computer program.

I have seen on this board diminish the type of projects with the different swingarm swaps. At the same time the knowledgeable people push out of the board. Its a shame since that knowledge is hard to replace. It seems all is posted is the maintenance and upkeep in keeping the bikes running. The creativity with knowledge is gone. I hope it comes back.
1991 3MATZR250SP
!993 3XVTZR250SP
1996 RGV250(Lucky Strike)
1994 MC28SP
1995 MC28SP
1996 MC28SP
1985 RG500(Walter Wolfe)
1984 IT490
1985 RZV500R
1985 NS400R
1985 NS400R
1997 VFR750
1992 FZR1000
RGV400
TZR500
TZR350
1990 RZ350
1971 Porsche911S

RC45
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Re: ex tz350-750-rgb500-rider

#7 Post by RC45 » Thu May 03, 2018 9:47 pm

The answer to why the project dry spell is real simple really.

The cost of engine modding has kept going up to the point of anything outside of maintenance is beyond the cost of the average punter, and if you are going to spend $10,000 on a modded Gamma motor or $6000 on a modded RZ500 motor you are well on your way to just spending $15000 to $20000 and buying an excellent stock RZ500 or RG500.

To be honest I slowed down on my 2 RZ500 projects to build a WSBK CBR1000RR SP2, as the cost benefit of the 2017 CBR1000RR SP@ is far better than the same exercise done on a 30 year old RZ500.

That being said my OW81 YZR500 project shoudl get a well needed shot int he arm later this year :)
CBR1000RR SP2 HRC WSBK
TZ500V/OW53 Track bike
YZR500 OW81 Clone
OW69 Daytona 200 Replica - 784cc Monster
NS400 Track Bike
RS250R NF5
TZ250T 2KM
TZ250B 3YL
TZR250 3MA Track Bike
427ci C5 Z07

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giron
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Re: ex tz350-750-rgb500-rider

#8 Post by giron » Thu May 03, 2018 10:05 pm

I'm in the process now of my hybrid RZ500 and RZ350 hybrid getting build. I pay around $2K for the RZ500 engine used. but BT will do a stock rebuild pipes and carburetor that's extra. I prefer having the engines rebuild stock.The 3MA frames are still very affordable. That's what I'm using. I source the RZ500 pipes from Japan. They are Suheiro pipes and they cost me used $300.00. They are specifically made for RZ500 engine on a 3MA frame The RZ350 will need pipes and a rebuild for the 3MA frame. I let BT do it. The build for the RZ500 it looks like it will be done for less than 8K. The Rz350 is less.

Now the VJ22 will be the most expensive since I plan to order the kit from a builder. I brought the RG400 engine from Japan with all the electronics for around $600.00. yes it was a while ago. You can still get RG400 engines for less than $1K

The parts are still affordable as long you take your time and do your homework. yes you can go to the dealer and buy something from the showroom. The sound of a two stroke is no comparison. I'm dealing with two fabricators and parts from a third fabricator. they are very knowledgeable and are affordable.
1991 3MATZR250SP
!993 3XVTZR250SP
1996 RGV250(Lucky Strike)
1994 MC28SP
1995 MC28SP
1996 MC28SP
1985 RG500(Walter Wolfe)
1984 IT490
1985 RZV500R
1985 NS400R
1985 NS400R
1997 VFR750
1992 FZR1000
RGV400
TZR500
TZR350
1990 RZ350
1971 Porsche911S

RC45
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Location: Houston, Texas.

Re: ex tz350-750-rgb500-rider

#9 Post by RC45 » Thu May 03, 2018 10:23 pm

Hate to disagree - a dry clutch and Nova transmission for an RG500 is a $3000 to $5000 exercise + robust RG500 engine build is another $3000 to $5000 and if you are going to do a track worthy replica RG500 you need to have the motor to back up the Barry Sheen looks.
CBR1000RR SP2 HRC WSBK
TZ500V/OW53 Track bike
YZR500 OW81 Clone
OW69 Daytona 200 Replica - 784cc Monster
NS400 Track Bike
RS250R NF5
TZ250T 2KM
TZ250B 3YL
TZR250 3MA Track Bike
427ci C5 Z07

silverstrom
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Re: ex tz350-750-rgb500-rider

#10 Post by silverstrom » Fri May 04, 2018 12:04 am

I'd like to hear more from the original poster, howie43.

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giron
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Re: ex tz350-750-rgb500-rider

#11 Post by giron » Fri May 04, 2018 12:21 am

I would never do the upgrades you mention. It sounds that can compromise reliability. I'm not chasing a purse. I see my fleet of two strokes to be enjoyed on the canyons of northern California. The parts you mention are very nice and very expensive, but for me I like to enjoy my two strokes and more keep the money in the bank.

I don't see why a stock RG500 build should be that high nor a RZ500. At least with the builder I know
1991 3MATZR250SP
!993 3XVTZR250SP
1996 RGV250(Lucky Strike)
1994 MC28SP
1995 MC28SP
1996 MC28SP
1985 RG500(Walter Wolfe)
1984 IT490
1985 RZV500R
1985 NS400R
1985 NS400R
1997 VFR750
1992 FZR1000
RGV400
TZR500
TZR350
1990 RZ350
1971 Porsche911S

RC45
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Location: Houston, Texas.

Re: ex tz350-750-rgb500-rider

#12 Post by RC45 » Fri May 04, 2018 1:56 am

Nova transmission is for ultra reliability on track, robust RG500 build is also for on-track reliability.

A few breakfast runs, the odd cars and coffee and an concourse event are not the same as running on track.

These are not $500 used part rebuild bikes on track.



Last edited by RC45 on Fri May 04, 2018 2:04 am, edited 1 time in total.
CBR1000RR SP2 HRC WSBK
TZ500V/OW53 Track bike
YZR500 OW81 Clone
OW69 Daytona 200 Replica - 784cc Monster
NS400 Track Bike
RS250R NF5
TZ250T 2KM
TZ250B 3YL
TZR250 3MA Track Bike
427ci C5 Z07

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giron
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Re: ex tz350-750-rgb500-rider

#13 Post by giron » Fri May 04, 2018 2:03 am

breakfast or lunch runs either ones. They are street reliability that I'm after. I prefer to have stock engines with carburetors and pipes from BT. The rest of the money I save from exotic parts. I prefer to have it in the bank or in the stock market. I don't need to chase a purse at my age. I can hurt easy and I would hurt just as much if I damage one of my bikes. A few willies and leaning the bikes on the canyons that's pretty much by me
1991 3MATZR250SP
!993 3XVTZR250SP
1996 RGV250(Lucky Strike)
1994 MC28SP
1995 MC28SP
1996 MC28SP
1985 RG500(Walter Wolfe)
1984 IT490
1985 RZV500R
1985 NS400R
1985 NS400R
1997 VFR750
1992 FZR1000
RGV400
TZR500
TZR350
1990 RZ350
1971 Porsche911S

Questo vecchio rz
Posts: 198
Joined: Sun Aug 30, 2015 2:36 pm

Re: ex tz350-750-rgb500-rider

#14 Post by Questo vecchio rz » Fri May 04, 2018 2:21 am

giron wrote: I don't see why a stock RG500 build should be that high nor a RZ500. At least with the builder I know
giron wrote:breakfast or lunch runs either ones. They are street reliability that I'm after. I prefer to have stock engines with carburetors and pipes from BT. I don't need to chase a purse at my age. I can hurt easy and I would hurt just as much if I damage one of my bikes. A few willies and leaning the bikes on the canyons that's pretty much by me
Yeah, we share some practical viewpoints. Got thrown off my Banshee hard last week.... I'm sore as F#@k.. my hands are cramped..knee hurts etc...our minds may be young...but our bodies are NOT! Crash on the street, were not walking or riding away...lol

My friends bike us at BTs you've viewed it, it's looking damn good, front,/rear R-6 swap, and various modifications plus the motor rebuild, and the new exhuasts he's building. Friend ordered a few dry clutch kits as well, 1 for the RZ, the others for the GSXRs. BT said he will do this for him as well.
Basically as you know it's it total rebuild of a old forum YZR replica, but the motor rebuild quote was very reasonable as it's basically going over a already modfied engine from another builder, I trust his work like few others.

Once you make the step to modify, the cost exponentially increases. Especislly on a RG, He's wants Mark Dent to do a complete RG 570 performance engine w Mark's pipes..but I'm trying to talk him into just a basically mild stock rebuild, it will still have close to 90 h.p....thats plenty good. It was very fast then, 32 years later... it's fast enough.

Giron..Email me...list your contact info on my old phone, I can ask Steve I suppose. l bought a 86 VFR750 race bike, for a song, so I'm doing a psudo "Merkel" inspired replica..I'm looking for a ( left side) 4-1 ..Wondering if you can search your Japan contacts, trying to see what's out there, not a factory HRC system..but a replica like many Japanese enthusiasts are doing for the old VFR.. just want to see if there's anything out there, or I can have Brian fabricate one up, if I buy a Kerker can. Needs to be sprig clamped in 6 areas. I should give him a call see what he thinks.
Im looking for a 96 SRAD Yoshimura high mount mid pipe or full system. I was at Yoshimura, but they said no SRAD parts are available anymore not even from Yosh Japan. Sorry off the 2 stroke for awile...Until I finish my RZ and Baja Banshee .
Banshee (Baja) Full Tilt desert race bike
Royal Enfield 500
96 GSXR SRAD, Future Yoshimura TT-F1 Lucky Strike rep.
85 custom Tri-Z
RZ421/YZR track bike(project)
86 VFR750 Flying Fred Merkel replica (project)

silverstrom
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Re: ex tz350-750-rgb500-rider

#15 Post by silverstrom » Fri May 04, 2018 4:24 am

I'd like to hear more from the original poster, howie43.

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