Author Topic: The RD Technical Information Library  (Read 10732 times)

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Offline Panuno

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The RD Technical Information Library
« on: May 26, 2014, 09:53:22 AM »
In the posts below will be various types of technical information related to the RD and other two stroke twins in general.

First one is supplied by Punano

Just scanned this in as it might be useful for many people here.
Scan is from the early R5/DS7/RD250/RD350 Official Yamaha Service Manual.

* RD 250_350 Wiring & Cable Route.pdf (2277.08 kB - downloaded 847 times.)
« Last Edit: June 08, 2014, 11:08:54 AM by SupeRDel »
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RD 350B:  K75 'Flying Brick': RD 250B in several Boxes..   Best 350 RD '013
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Offline SupeRDel

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Re: The RD Technical Information Library
« Reply #1 on: June 08, 2014, 11:15:41 AM »
Information Supplied by RDnuts

HERE ARE SOME FIGURES OF CC ADDED WHEN YOU DO A REBORE WHICH MAY BE USEFULL INFO, BORE IN MM FIRST. STROKE IN MM SECOND.

RD250 ,      IST STANDARD   = 53.96 X 54 =246.98 CC          RD350, IST STANDARD =  63.96 X 54 = 347.00 CC
                  2ND STANDARD  = 53.98 X 54 =247.16 CC                      2ND STANDARD = 63.98 X 54 = 347.22 CC
                  FIRST OVER        = 54.25 X 54 =249.64 CC                      IST OVERSIZE =   64.25 X 54 = 350.18 CC
                  SECOND OVER   = 54.50 X 54 =251.95 CC                      2ND OVERSIZE =  64.50 X 54 = 352.89 CC
                  THIRD OVER       = 54.75 X 54 =254.26 CC                      3RD OVERSIZE =  64.75 X 54 = 355.63 CC
                  FOUTH OVER      = 55.     X54 = 256.59 CC                      4TH OVERSIZE =  65      X 54 = 358.38 CC     


Information Supplied by Hairy Scotsman

RD400 E /F

Standard = 64.00 x 62 = 398.70cc
.25 over  = 64.25 x 62 = 401.83cc
.50 over  = 64.50 x 62 = 404.96cc
.75 over  = 64.75 x 62 = 408.10cc
1.00 over = 65.00 x 62 = 411.26cc
1.25 over = 65.25 x 62 = 414.43cc
1.50 over = 65.50 x 62 = 417.61cc
1.75 over = 65.75 x 62 = 420.81cc
2.00 over = 66.00 x 62 = 424.01cc

I've heard that they can go to as much as 2.5 oversize, which is

2.50 over = 66.50 x 62 = 430.46cc
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Offline SupeRDel

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Re: The RD Technical Information Library
« Reply #2 on: June 08, 2014, 11:20:44 AM »
Information Supplied by T reg angst

A jetting Guide / Aid

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Offline SupeRDel

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Re: The RD Technical Information Library
« Reply #3 on: June 08, 2014, 06:04:39 PM »
Torque Settings

Cylinder head              13-15 ft-lb
Spark plug                 10-18 ft ?lb
Primary drive              36-58 ft-lb
Clutch centre              36-58 ft-lb
Clutch spring              5-7 ft-lb
F/Sprocket                 36-58 ft-lb
Gear change lever          6-9ft-lb
K/start lever              14-18 ft-lb
Casing bolts 6mm           6-8 ft-lb
8mm                             13-15 ft-lb
Mounting bolts 8mm         13-15 ft-lb
Mounting bolts 10mm        19-24 ft-lb
Fork pinch bolts           13-15ft-lb
Steering head nut          30-37ft-lb
Fork cap                   15-21ft-lb
Shock mounts               16-26ft-lb
Swing arm                  36-58 ft-lb
F/wheel spindle            60-94 ft-lb
R/wheel spindle            86-120ft-lb
F/wheel clamps             13-15ft-lb
Caliper bolts              28-36ft-lb
Disc bolts                 13-16ft-lb
Alternator bolt A-D        10-18ft-lb
Alternator nut E           58ft-lb

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Re: The RD Technical Information Library
« Reply #4 on: July 04, 2014, 06:17:59 PM »
Information supplied by Dave Miller stn10
The original post was done in 2010 so expect some availability problems

Here is a list of the parts that I bought for my 400f engine rebuild. I prefer genuine parts when I rebuild, but each to their own   Granby"s supplied nearly all that lot from stock. A pair of genuine crank seals cost approx ?12.00- I already had a new pair so didn"t put a price down for those. Hope that helps you.

Main shaft bearing (large) 93305-20502 x 1 - Granby"s - ?29.96
Main shaft bearing circlip 93440 52009 x 1 -Granby"s- ?3.16
Main shaft bearing (small) 93311 22005 x 1- Granby"s- ?13.37
Drive shaft bearing (large) 93306 30504 x 1- Granby"s-?14.61
Drive shaft bearing (small) 93311 42032 x 1- Granby"s- ?12.28
First gear bearing 93310 22057 x 1 - Granbys- ?6.68
First gear bearing circlip x 1 -Granbys- ?1.44
Drive shaft oil seal 93102 35054 x 1 - Granby"s -?6.81
Selector fork rods blind seals 90338 22009 x 2 - Granby"s - ?5.38
Selector fork rods "E" clips 93430 10016 x 4 -Granby"s - ?2.64
Gearchange oil seal 93101 12004 x 1-Granby"s- ?4.22
Gearchange shaft circlip 93430 10016 x 1- Granby"s-0.72p
Gearchange shaft washer 90201 12575 x 1- Granby"s-?1.49
Neutral switch cover 278 82540 01 x 1- Granby"s- ?11.37
Neutral switch "O" ring 93210 29147 x 1- Granby"s-?1.69
Clutch pushrod seal 237 15389 00 x 1- Granby"s- ?1.79
Selector drum bearing 93315 23612 x 1 - Granby"s - ?7.21
Selector drum circlip 93410 30012 x 1 - Granby"s- ?1.88
Detent bolt gasket 137 15353 00 x 1 - Granby"s - ?3.84
Detent bolt spring 90501 10062 x 1 -Granby"s - ?0.58
Drain plug gasket 137 15353 00 x 1- Granby"s-?0.35p
Tacho gear circlip 93430 08006 x 1- Granby"s -?0.91p
Tacho gear washer 90201 10135 x 1 - Granby"s -?0.94p
Tacho drive "O" ring 93210 13016 x 1 - Granby"s -?0.80p
Idler gear circlip 93410 15005 x 1 - Granby"s- ?1.10
Idler gear wave washer 90206 15055 x 1 - Granbys-?1.35
Crank oil seal left side 93103 40077 x 1
Crank oil seal right side 93103 25108 x 1
Woodruff key 90280 05013 x 1 - Granby"s- ?3.82
Engine spacer "O" rings 93210 11073 x 4 - Already had these
Approx 50 stainless nuts, bolts, washers, screws - ?7.00 Bought locally
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