weight for rz350 stripped to race trim?

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graham heise
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weight for rz350 stripped to race trim?

#1 Post by graham heise » Sun Apr 16, 2017 6:42 am

G'day race fans. Wondering what sort of weight an rz350 would be in race trim. all road gear removed. just a tacho, maybe tz style fiberglass seat. I'm thinking of building a track bike with whats laying around. i have some good low weight chambers. i weighed my street rz today with a full tank it came in at 175kg. that bike is a 31k with chambers. i'm thinking a stripped rz could be 20-25 kg lighter then street??
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T.RexRacing
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Re: weight for rz350 stripped to race trim?

#2 Post by T.RexRacing » Sun Apr 16, 2017 3:24 pm

WHEELS.........some heavy muthas.
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RuZty
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Re: weight for rz350 stripped to race trim?

#3 Post by RuZty » Sun Apr 16, 2017 8:26 pm

I put some '86 wheels on my '85, they were nearly 2 lbs lighter per wheel, and they look it.

hondaror
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Re: weight for rz350 stripped to race trim?

#4 Post by hondaror » Thu Apr 27, 2017 3:50 am

I have a 31K, I just cut about 2 kg of tabs and frame tube off. Going to mount the AirTECH bodywork to. I'll do a weigh in when it's finished.
Rory
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine

evan_calgary
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Re: weight for rz350 stripped to race trim?

#5 Post by evan_calgary » Thu Apr 27, 2017 12:13 pm

You are talking 55lbs lighter? I doubt it without some real cash.

The glass fairings are heavier than stock.

The pipes are most definitely lighter but less than everyone claims. "save 35 pounds on pipes!" Not a chance. Maybe 10?

5 pounds if you remove the plastic cladding, oil tank, pump etc.
10 pounds with your pipes
5 pounds with lightweight battery.
Pound for gauges
pound for shock
4 pounds for wheels
2 pounds F2 rearsets

Where does the last ~30 pounds come from?

justind97
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Re: weight for rz350 stripped to race trim?

#6 Post by justind97 » Thu Apr 27, 2017 12:26 pm

evan_calgary wrote:You are talking 55lbs lighter? I doubt it without some real cash.

The glass fairings are heavier than stock.

The pipes are most definitely lighter but less than everyone claims. "save 35 pounds on pipes!" Not a chance. Maybe 10?

5 pounds if you remove the plastic cladding, oil tank, pump etc.
10 pounds with your pipes
5 pounds with lightweight battery.
Pound for gauges
pound for shock
4 pounds for wheels
2 pounds F2 rearsets

Where does the last ~30 pounds come from?
mudguard/license bracket, tail light, grab handle, seat, headlight, signals, maybe chop down the fairing stay, superbike bars -> clip ons, kickstand, center stand . I'd say you're getting close to 30lbs.

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Re: weight for rz350 stripped to race trim?

#7 Post by hondaror » Sun Apr 30, 2017 11:17 pm

You should be able to get close to 250 pounds if you got aggressive with the weight reduction, dry weight. Not an easy task.
Going premix and dumping the autolube system, kick starter and cluster is another good dump. As mentioned, signals, speedo, all associated wire, drilling all washers, lighter wheels, a seat kit is a helluva lot lighter then the seat, bracketry, and lighting, and rear bodywork. Cutting all associated tabs off the frame, cutting the clutch case excess off after oil pump removed, aluminum swingarm..and the list goes on.
The TZ250s of the early 80s were about 220 lbs dry.
Rory
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
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Re: weight for rz350 stripped to race trim?

#8 Post by MK » Mon May 01, 2017 3:00 pm

My race RZ has 132kg with affordable effort.
R6 front end incl. brakes & rim, DIY aluminium tank and subframe, RGV swinger, 5x17 KTM spoked rear + cut off every bracket on the frame
Unfortunately the rider is constantly adding a few kg per year....
Bye
Martin

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alexanderdraper
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Re: weight for rz350 stripped to race trim?

#9 Post by alexanderdraper » Wed Aug 16, 2017 10:41 am

my race rz was also 290lbs (131kg) thats with
-going to 17" (1990 gsxr wheels)
-gpl pipes
-alu swingarm
-stripped out frame with gusseting added (it was still only 22 lbs)
-total loss ignition with tiny battery
-airtech bodywork/seat
-different forks
-custom alu. rearsets

I'm hoping to make some changes that will lower that some more. r6 front wheel (with only one brake rotor and caliper), yzf600 rear wheel (with swiss-cheese brake rotor), alu tank, and alu tail section.
i think that'll get it down another 10 lbs.

id love to do some more trick stuff like
switching out fasteners to Ti, Ti chambers, magnesium wheels, fiberglass/carbon tank.
BUT that shit is expensive! mag wheels would be at least $5k for 2 sets (slicks and rains)
Porting&pipes by GPL racing, hotrods 4mm crank,
mikuni36mmTM, zeel ignition, V-Force4, gusseted 86frame, Fz600 swingarm, 89gsxr750 wheels&brakes, Elka shock, fzr600 forks with r6 internals fitted by accelerated tech

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Questo vecchio rz
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Re: weight for rz350 stripped to race trim?

#10 Post by Questo vecchio rz » Thu Aug 31, 2017 3:43 am

Graham, as mentioned above. About 10 lbs above or below the 300 lb mark, is what you will be looking at, as stated anything below the 290 lb range, starts to cost serious money & customization $.

I would never expect to view a RZ anywhere below 270 lbs, no matter what even w everything listed above and adding carbon bodywork and rims & a couple thousand dollars of Titanium into the mix. At that point , there's just nowhere else to realistically go with what you have.
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alexanderdraper
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Re: weight for rz350 stripped to race trim?

#11 Post by alexanderdraper » Thu Apr 12, 2018 11:08 pm

I bet you could get down to 170lbs with all the lightest stuff.
20 people donate me $1000.00 each and ill give it a real shot!
PM me for details on how to send me the money. ;-)
Porting&pipes by GPL racing, hotrods 4mm crank,
mikuni36mmTM, zeel ignition, V-Force4, gusseted 86frame, Fz600 swingarm, 89gsxr750 wheels&brakes, Elka shock, fzr600 forks with r6 internals fitted by accelerated tech

addicted to relics
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Re: weight for rz350 stripped to race trim?

#12 Post by addicted to relics » Wed Aug 08, 2018 8:49 pm

what would be the weight of stock fairings as I am going street fighter style and cut all fairing gussets, chopped 8in from frame and seat loosing all blinkers, (integrated headlight and taillight smaller batterie, loosing oiling system what you guys think my result weight is going to be?

brrrappp
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Re: weight for rz350 stripped to race trim?

#13 Post by brrrappp » Thu Sep 20, 2018 9:54 am

Adding lightness.....The key switch/steering lock is kind of heavy. You could remove that and substitute a plastic marine toggle switch. Racers have no need for a steering lock.
You can sub PVC pipe for your between-the-bearing wheel spacers as long as you can make a good straight cut on the PVC.

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