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RD350 spoke torque spec

Started by Plasticman, July 08, 2020, 11:21:50 AM

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Plasticman

What is the torque spec for RD350 spoked wheel spokes?

Rob
1976 - RD400 - road racer
1977 - RD400 - project (single shock/cartridge fork/modern wheels/brakes)
1978 - RD400 - Auburn themed motorcycle
1979 - RD400 - Daytona (under restoration)

Czakky

I don't know thus for certain, but I would confidently say any spoke torque of equal material should be sufficient.

Plasticman

I know there's a spec for torquing the spokes, I'm just trying to find out what it is. I would think it would be in the manual, but I don't have one for an RD350 handy (mine's buried in storage).

Rob
1976 - RD400 - road racer
1977 - RD400 - project (single shock/cartridge fork/modern wheels/brakes)
1978 - RD400 - Auburn themed motorcycle
1979 - RD400 - Daytona (under restoration)

SoCal250

#3
Rob,

I checked my factory repair and owners manuals. Both instruct to tighten spokes periodically but no torque spec is provided. It just says to tighten loose spokes 1 turn.

I did find a spoke torque spec in a CS5 manual: 15 kg-cm (or 1.1 lb-ft). Equivalent to 13 in-lb). If I come across anything else I'll post it here.

Here's some info on wheel lacing posted in the Tech Library
THE TECH LIBRARY »SUSPENSION - WHEELS
75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

Plasticman

Thanks.  Various motocross and motorcycle wheel websites are saying to torque between 30 and 48 in-lbs.  My RD350 manual is in storage, so I was hoping there would be info in the manual, but maybe not.

Rob
1976 - RD400 - road racer
1977 - RD400 - project (single shock/cartridge fork/modern wheels/brakes)
1978 - RD400 - Auburn themed motorcycle
1979 - RD400 - Daytona (under restoration)

Still biking

If you are torquing are new or fairly new wheel, a torque spec has relevance.  If you are torquing a used wheel with significant exposure to elements, torque spec is irrelevant.  Loose spokes, trueness of wheel takes over.

MRDRcycle

#6
I was trying to find the torque spec as well. Do you happen to know what size spoke wrench to get? Seems like its about 5.6mm

( I just got a spanner tool in today and the 5.8mm Adapter fits well on the front and rear wheels.) ( My manual arrives tomorrow and I'll check to see if there is a torque specification. )

I got the haynes manual and there isn't much regarding spoke maintenance. It basically states what the video link below covers.

This might help too if you don't go by a torque setting:
https://video.search.yahoo.com/search/video?fr=mcafee&p=spoke+adjustment#id=1&vid=e31ba532938c2ab6293e96c1d73afbdc&action=click

Diablo007

I have to dig out the paperwork to be 100% sure, but I recall the torque given by Buchanan's for the new stainless spokes/nipples for my Royal Enfield as 80 in-lbs.
2 stroke junkie:
Too many motorcycles to list.  The highlights:
1973 Yamaha RD350 Cafe Racer project; 1983 Suzuki RG250 YammaGamma project; 1988 Yamaha YSR50/80 project; 1984 Yamaha RZ350; 1984 Yamaha RZ500

Diablo007

Dug out the paperwork.  80 in-lbs is for 'large displacement motorcycles'.  Don't think the RD350 is 'large displacement motorcycle' or the Bullet 500 for which I re-spoked the front wheel.  Didn't use a spoke torque wrench so I don't know what the torque is.  Just made sure they were 'relatively' tight and all rang the same when tapped with the spoke wrench.  Old timer told me that you want a 'ting' sound...for what that's worth.
2 stroke junkie:
Too many motorcycles to list.  The highlights:
1973 Yamaha RD350 Cafe Racer project; 1983 Suzuki RG250 YammaGamma project; 1988 Yamaha YSR50/80 project; 1984 Yamaha RZ350; 1984 Yamaha RZ500

quocle603

I know tusk makes a torque wrench for spokes, but not 100% on the specs. Just make sure the wheel is true.
Do not underestimate the power of a two-stroke.

1975 Yamaha RD350 (modified), 1973 Yamaha RD350 (stock), 1971 Suzuki T500, 1981 Yamaha XS650 HS2, 1982 Honda MB5, 1980 Puch Maxi, 1979 Puch Magnum, 1993 Tomos Bullet, 2003 Malaguti Firefox F15 LC