kobra's 1985 RZ350NC2 basket case restoration
Moderator: rztom
Re: New project '85 RZ350 NC2
More progress.
Fortunately the bike came with two clusters. One had been crashed in and is pretty beat up. The other had some rusty screws and a broken reset knob. Both were super dirty! So I took the best parts from both and made one good one. Spent my time polishing the clear covers using Meguiar's plastic cleaner.
I love how simple these gauges are. Totally mechanical.
ALSO, I am about to buy all the engine gaskets and whatnot. Here's my list so far:
Power valve o-rings and end seals
Crank seals
Shift shaft seal
Countershaft seal
Clutch shaft seal
Clutch shaft bearing
Water pump seal
Base Gaskets
Head gasket
Coolant pipe o-ring
Clutch cover gasket
Reed valve gaskets
Is there anything I am missing^?
Also, I found two rubber rings in the clutch stackup. One furthest inward and one furthest outward. Are those needed? The clutch kit I am looking at does not include them.
Fortunately the bike came with two clusters. One had been crashed in and is pretty beat up. The other had some rusty screws and a broken reset knob. Both were super dirty! So I took the best parts from both and made one good one. Spent my time polishing the clear covers using Meguiar's plastic cleaner.
I love how simple these gauges are. Totally mechanical.
ALSO, I am about to buy all the engine gaskets and whatnot. Here's my list so far:
Power valve o-rings and end seals
Crank seals
Shift shaft seal
Countershaft seal
Clutch shaft seal
Clutch shaft bearing
Water pump seal
Base Gaskets
Head gasket
Coolant pipe o-ring
Clutch cover gasket
Reed valve gaskets
Is there anything I am missing^?
Also, I found two rubber rings in the clutch stackup. One furthest inward and one furthest outward. Are those needed? The clutch kit I am looking at does not include them.
Re: New project '85 RZ350 NC2
Clutch rings are not required.
There are gasket kits out there which will include most of what you need.
There are gasket kits out there which will include most of what you need.
'82 RD350LC in '81 colours, OEM pipes, UNI filters
'85 FZ750
'85 FZ750
Re: New project '85 RZ350 NC2
The kits are often aftermarket (Athena?). I am wary of using anything other than OEM just so I don't have any issues. It also looks like I can build a OEM kit for about the same price as a pre-built aftermarket kit. The catch? I can't find a list of what's included in these aftermarket kits, just a photo.Hooligan wrote:Clutch rings are not required.
There are gasket kits out there which will include most of what you need.
Re: New project '85 RZ350 NC2
Other than crank seals and head gasket, I wouldn't worry about aftermarket for the rest.
'82 RD350LC in '81 colours, OEM pipes, UNI filters
'85 FZ750
'85 FZ750
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Re: New project '85 RZ350 NC2
Genuine Yamaha is always best. Even if you pay more you'll know that what you get will fit properly and it will last. The only time I say aftermarket is ok to use is when OEM no longer exists and there is no other option. As a last resort aftermarket will have to do. If OEM is available use it.
If you can't afford OEM gaskets and seals you shouldn't be building a bike. Going cheap will get you cheap.
Nice job on the clocks. They look great
If you can't afford OEM gaskets and seals you shouldn't be building a bike. Going cheap will get you cheap.
Nice job on the clocks. They look great
Re: New project '85 RZ350 NC2
Exactly, definitely agree. Anyone have input on identifying the following so I know what to order? Thank you.silverstrom wrote:Genuine Yamaha is always best. Even if you pay more you'll know that what you get will fit properly and it will last. The only time I say aftermarket is ok to use is when OEM no longer exists and there is no other option. As a last resort aftermarket will have to do. If OEM is available use it.
If you can't afford OEM gaskets and seals you shouldn't be building a bike. Going cheap will get you cheap.
Nice job on the clocks. They look great
1. Engine/reed gasket
2. Reed/spigot gasket
3. Head gasket
4. ?
5. ?
6. ?
7. Base gasket
8. ?
9. ?
10. Waterpump gasket
11. ?
12. ?
13. Crankcase cover gasket
14. Transmission drain plug washer?
- two-stroke-brit
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Re: New project '85 RZ350 NC2
11 is the head to down spout gasket
12 is the oil pump gasket
12 is the oil pump gasket
350LC,Athena 392 big bore,stock porting,swiss cheese air box,stock reeds,spec11 pipes.(now TSA big bore pipes)
She might not be pretty but she will always be a fun ride
1982 YAMA RD350LC
98KDX 220R
1967 TRIUMPH TIGER
2001 TRIUMPH TT600
She might not be pretty but she will always be a fun ride
1982 YAMA RD350LC
98KDX 220R
1967 TRIUMPH TIGER
2001 TRIUMPH TT600
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Re: New project '85 RZ350 NC2
4 and 5 are airbox gaskets. 6 is powervalve seals. 8 and 9 are likely the dipstick o-ring and the metal water pipe o-ring.
I'll never understand why anyone would use those kit o-rings on powervalves. That is one place you don't want to be using cheap o-rings. Spend the money and use the proper Yamaha o-rings that will take the heat and abuse they will definitely get. If you do use the kit o-rings and they do fail, the few dollars saved won't seem like much of a bargain when you're pulling the top end.
I'll never understand why anyone would use those kit o-rings on powervalves. That is one place you don't want to be using cheap o-rings. Spend the money and use the proper Yamaha o-rings that will take the heat and abuse they will definitely get. If you do use the kit o-rings and they do fail, the few dollars saved won't seem like much of a bargain when you're pulling the top end.
Re: New project '85 RZ350 NC2
Sweet!
Surprisingly, the powervalve seals on my cylinders were still really tight, round, springy. I expected them to be rock hard. I wonder if they had been replaced at some point late in its life.
Since I can't find a kit with only the non-important gaskets I am just going to buy all OEM.
Also, any reason I can't use yamabond or comparable sealant on some of these? Modern bikes use almost exclusively sealant since the advent of CNC sealant appliers at the factory - cheaper and more reliable. Back then, assembly was quicker with a paper gasket.
Surprisingly, the powervalve seals on my cylinders were still really tight, round, springy. I expected them to be rock hard. I wonder if they had been replaced at some point late in its life.
Since I can't find a kit with only the non-important gaskets I am just going to buy all OEM.
Also, any reason I can't use yamabond or comparable sealant on some of these? Modern bikes use almost exclusively sealant since the advent of CNC sealant appliers at the factory - cheaper and more reliable. Back then, assembly was quicker with a paper gasket.
Re: New project '85 RZ350 NC2
Does anyone know what #13 is for? Mine was half broken up, falling off, soaked in oil. It appears to possibly be a protective pad, to protect against something?
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Re: New project '85 RZ350 NC2
I believe #13 is just a damper and mostly useless. I wouldn't worry about it.
For best results with the paper type gaskets use Yamabond on both sides. I brush on a very thin layer. Reed gaskets, base gaskets, clutch cover. The paper gaskets may work well on their own, but reed and base gaskets are often the source of air leaks when pressure testing. Use Yamabond on them and solve the problem before it starts.
You must use the proper sealant. Yamabond is one option. All I have ever used is MotoSeal. Same properties and designed to seal case halves. https://www.permatex.com/products/uncat ... aker-grey/" onclick="window.open(this.href);return false;
For best results with the paper type gaskets use Yamabond on both sides. I brush on a very thin layer. Reed gaskets, base gaskets, clutch cover. The paper gaskets may work well on their own, but reed and base gaskets are often the source of air leaks when pressure testing. Use Yamabond on them and solve the problem before it starts.
You must use the proper sealant. Yamabond is one option. All I have ever used is MotoSeal. Same properties and designed to seal case halves. https://www.permatex.com/products/uncat ... aker-grey/" onclick="window.open(this.href);return false;
Re: New project '85 RZ350 NC2
Perfect, I already have a tube. I was planning to use Motoseal for anything exposed to gas (case halves, intake seals), and the Ultra Black for the crankcase cover because it's submerged in oil. Never had it leak before and is a lot easier to work with because it's thicker and stays put.silverstrom wrote:I believe #13 is just a damper and mostly useless. I wouldn't worry about it.
For best results with the paper type gaskets use Yamabond on both sides. I brush on a very thin layer. Reed gaskets, base gaskets, clutch cover. The paper gaskets may work well on their own, but reed and base gaskets are often the source of air leaks when pressure testing. Use Yamabond on them and solve the problem before it starts.
You must use the proper sealant. Yamabond is one option. All I have ever used is MotoSeal. Same properties and designed to seal case halves. https://www.permatex.com/products/uncat ... aker-grey/" onclick="window.open(this.href);return false;
Re: New project '85 RZ350 NC2
#13 is a damping pad to reduce noise emissions from the gearbox.
Earlier models didn't have one, so there's no danger in leaving it out.
Earlier models didn't have one, so there's no danger in leaving it out.
Bye
Martin
Martin
Re: New project '85 RZ350 NC2
Good to know.
Similar to the dynamat on the inside of the stator cover. Both were soaked in oil and scraped off with ease.
Similar to the dynamat on the inside of the stator cover. Both were soaked in oil and scraped off with ease.
Re: New project '85 RZ350 NC2
These DG pipes aren't bad, in fact they're Damn Good for the price. Yeah the welds aren't absolutely perfect and they aren't flashy, but the silencers look great and they look decent overall.
They weigh 5 pounds each whereas the stock pipes weigh 13 pounds each! So that's 16 pounds saved total.
Next I sandblasted the top case half and need to figure out what to do with this. I will hopefully get some help and use the tools at my disposal to create a fix.
They weigh 5 pounds each whereas the stock pipes weigh 13 pounds each! So that's 16 pounds saved total.
Next I sandblasted the top case half and need to figure out what to do with this. I will hopefully get some help and use the tools at my disposal to create a fix.