1980 RM400T Head / Cylinder torque spec...

Hudweiser9
Profile picture for user Hudweiser9
Posts
451
Joined
4/8/2014
Location
Ormond Beach, FL US
Hudweiser9
Edited Date/Time 5/3/2022 7:19am
Anyone have the torque specs handy for a 1980 RM400T cylinder and head?

Thanks,
|
sandman768
Profile picture for user sandman768
Posts
6101
Joined
3/21/2014
Location
Saratoga Springs, NY US
sandman768 4/11/2022 3:06pm
4/11/2022 3:06pm
Nothing in Clymer manual for cylinder torque values , let me know if you need anything else out of the manual.


Hudweiser9
Profile picture for user Hudweiser9
Posts
451
Joined
4/8/2014
Location
Ormond Beach, FL US
Hudweiser9 4/11/2022 6:46pm
4/11/2022 6:46pm
Thanks Sandman768. I wonder why the they don't list the cylinder base nuts torque specs? That seems strange. Oh well, thanks again.
1
450exc115
Profile picture for user 450exc115
Posts
664
Joined
11/6/2014
Location
Hebron, CT US
450exc115 4/11/2022 9:22pm
4/11/2022 9:22pm
Probably because you can't get a torque wrench on them unless you use a crows foot and even then only someone who knows what they are doing could get the torque right. Usually the clymer manual has a torque chart based on general size somewhere that should get you in the ball park.
1
sandman768
Profile picture for user sandman768
Posts
6101
Joined
3/21/2014
Location
Saratoga Springs, NY US
sandman768 4/12/2022 7:24am
4/12/2022 7:24am Edited Date/Time 4/12/2022 7:25am
Just slowly tighten a little at a time in cross cross pattern…. I did include the head tightening sequence, figured that would be the next question…Let’s see that bike👍

The Shop

See All »
Hudweiser9
Profile picture for user Hudweiser9
Posts
451
Joined
4/8/2014
Location
Ormond Beach, FL US
Hudweiser9 4/15/2022 7:01pm
4/15/2022 7:01pm
Sandman768,
Here's the bike and engine so far. Still have a few things to do, but getting there.



1
Achahoish 4/16/2022 1:33am
4/16/2022 1:33am
Hudweiser9 wrote:
Sandman768, Here's the bike and engine so far. Still have a few things to do, but getting there. [img]https://p.vitalmx.com/photos/forums/2022/04/15/544101/s1200_IMG_20220415_213316.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2022/04/15/544100/s1200_IMG_20220415_213249.jpg[/img]
Sandman768,
Here's the bike and engine so far. Still have a few things to do, but getting there.



Looks really good. Factory fresh
sandman768
Profile picture for user sandman768
Posts
6101
Joined
3/21/2014
Location
Saratoga Springs, NY US
sandman768 4/16/2022 5:47am
4/16/2022 5:47am
Awesome! Post more photos when done! You should have a build thread going…. The builds are the best in here…do I see some Gold Kawasaki GPZ wheels in that pile? I had a 79 RM250 that had all kinds of upgrades…One of the few bikes I have sold from my collection… here it is getting loaded up & headed to Tx I think…
Trackdog
Profile picture for user Trackdog
Posts
28
Joined
1/15/2022
Location
Shrewsbury, MA US
Trackdog 4/17/2022 4:47am
4/17/2022 4:47am
450exc115 wrote:
Probably because you can't get a torque wrench on them unless you use a crows foot and even then only someone who knows what they are...
Probably because you can't get a torque wrench on them unless you use a crows foot and even then only someone who knows what they are doing could get the torque right. Usually the clymer manual has a torque chart based on general size somewhere that should get you in the ball park.
Motion Pro makes a tool that might help.
Torque Wrench Adapter

Chrome-vanadium tool steel with hard nickel pewter finish
Properly torque two-stroke cylinder base nuts and hard-to-reach fasteners
Fits 12 and 14mm nuts and bolts
Extends the reach of any 3/8 inch drive torque wrench by 3 inches
Chart supplied for torque conversions
Check owners manual for proper torque specifications

Part No. 08-0134
$17.50
Hudweiser9
Profile picture for user Hudweiser9
Posts
451
Joined
4/8/2014
Location
Ormond Beach, FL US
Hudweiser9 4/18/2022 3:50pm
4/18/2022 3:50pm
Hudweiser9 wrote:
Sandman768, Here's the bike and engine so far. Still have a few things to do, but getting there. [img]https://p.vitalmx.com/photos/forums/2022/04/15/544101/s1200_IMG_20220415_213316.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2022/04/15/544100/s1200_IMG_20220415_213249.jpg[/img]
Sandman768,
Here's the bike and engine so far. Still have a few things to do, but getting there.



Achahoish wrote:
Looks really good. Factory fresh
Thanks! Been slow going, but finally making some progress.
Hudweiser9
Profile picture for user Hudweiser9
Posts
451
Joined
4/8/2014
Location
Ormond Beach, FL US
Hudweiser9 4/18/2022 6:39pm
4/18/2022 6:39pm
sandman768 wrote:
Awesome! Post more photos when done! You should have a build thread going…. The builds are the best in here…do I see some Gold Kawasaki GPZ...
Awesome! Post more photos when done! You should have a build thread going…. The builds are the best in here…do I see some Gold Kawasaki GPZ wheels in that pile? I had a 79 RM250 that had all kinds of upgrades…One of the few bikes I have sold from my collection… here it is getting loaded up & headed to Tx I think…
Thanks, I'll post more pics as I make progress. Redoing the rear wheel bearings/seals now. I may be installing an' 84 RM front end (triple clamps/43mm forks/dbl leading shoe front brakes). If I go that route, it will take a little more time. The forks need a rebuild. Not sure if I want to go the whole race tech gold valves route, maybe just RT springs.
Sweet looking '79 250! I was considering the Fox Airs for my 400 from Vintco, but got the Ohlins from a good buddy instead.
Yeah, good catch on the GPz wheels. That is a wheel for my '84 GPz 750 that my brother bought new in '84. It only has 12k miles on it. He let sit for years before I got it from him. Restoring it as well. Have the wheels,brake calipers and all new brake lines done. Have been working on the body parts lately. Going to do a Wayne Rainey replica.
sandman768
Profile picture for user sandman768
Posts
6101
Joined
3/21/2014
Location
Saratoga Springs, NY US
sandman768 4/19/2022 4:54am
4/19/2022 4:54am
I would not put a penny into the 79 front end if I had an 84 front end to swap. My 79 250 had the 43mm front end from an 82 465…along with the rear wheel from the 465, the stock 79 rear hubs would wear out & new bearings would just fall out. The fox airs came on the bike, always wanted Fox air shocks, could not afford as a kid. I had them rebuilt by a guy named Thor, he was supposed to be knowledgeable about the Fox shox, I rode the bike a handful of times, the shox were terrible, rebound wayyy to fast, you are much better off with the Ohlins. I recognized the GPZ wheels right away, I had a brand new GPZ 1100 in 84, it was fuel injected. I was an autobody refinisher at the time and did an ELR replica paint job on it, it was beautiful but the bike was a tank! The GSXR”s came out and instantly made the bike a relic. This is the only photo I could find of the bike…
Hudweiser9
Profile picture for user Hudweiser9
Posts
451
Joined
4/8/2014
Location
Ormond Beach, FL US
Hudweiser9 4/24/2022 4:34pm
4/24/2022 4:34pm
The '84 forks an triples are an easy redo. The front wheel will need new spokes and maybe rim. My rims are black. If it turns out to be a decent rim, may just powder coat it.
Good looking GPz. Similar to what I will be doing. I have the bottom engine fairing. Same here, the GSXR and Ninja made my GPz obsolete. Still a fun bike, should look pretty good once it's done.
Hudweiser9
Profile picture for user Hudweiser9
Posts
451
Joined
4/8/2014
Location
Ormond Beach, FL US
Hudweiser9 5/3/2022 6:38am
5/3/2022 6:38am
sandman768 wrote:
I would not put a penny into the 79 front end if I had an 84 front end to swap. My 79 250 had the 43mm...
I would not put a penny into the 79 front end if I had an 84 front end to swap. My 79 250 had the 43mm front end from an 82 465…along with the rear wheel from the 465, the stock 79 rear hubs would wear out & new bearings would just fall out. The fox airs came on the bike, always wanted Fox air shocks, could not afford as a kid. I had them rebuilt by a guy named Thor, he was supposed to be knowledgeable about the Fox shox, I rode the bike a handful of times, the shox were terrible, rebound wayyy to fast, you are much better off with the Ohlins. I recognized the GPZ wheels right away, I had a brand new GPZ 1100 in 84, it was fuel injected. I was an autobody refinisher at the time and did an ELR replica paint job on it, it was beautiful but the bike was a tank! The GSXR”s came out and instantly made the bike a relic. This is the only photo I could find of the bike…
Sandman768,
Questions about the '82 RM465 rear wheel... was it a bolt-on conversion, or was there some mods involved? If you had to modify anything, what did you have to do to make it work? Also, what pipe/silencer combo did you have on that '79 RM250? Thanks.
Hudweiser9
Profile picture for user Hudweiser9
Posts
451
Joined
4/8/2014
Location
Ormond Beach, FL US
Hudweiser9 5/3/2022 6:41am
5/3/2022 6:41am
450exc115 wrote:
Probably because you can't get a torque wrench on them unless you use a crows foot and even then only someone who knows what they are...
Probably because you can't get a torque wrench on them unless you use a crows foot and even then only someone who knows what they are doing could get the torque right. Usually the clymer manual has a torque chart based on general size somewhere that should get you in the ball park.
Trackdog wrote:
Motion Pro makes a tool that might help. Torque Wrench Adapter Chrome-vanadium tool steel with hard nickel pewter finish Properly torque two-stroke cylinder base nuts and...
Motion Pro makes a tool that might help.
Torque Wrench Adapter

Chrome-vanadium tool steel with hard nickel pewter finish
Properly torque two-stroke cylinder base nuts and hard-to-reach fasteners
Fits 12 and 14mm nuts and bolts
Extends the reach of any 3/8 inch drive torque wrench by 3 inches
Chart supplied for torque conversions
Check owners manual for proper torque specifications

Part No. 08-0134
$17.50
Trackdog,
Thanks for the info.... I picked one up. Now I just need the torque specs.
sandman768
Profile picture for user sandman768
Posts
6101
Joined
3/21/2014
Location
Saratoga Springs, NY US
sandman768 5/3/2022 7:19am
5/3/2022 7:19am
Hudweiser9 wrote:
Sandman768, Questions about the '82 RM465 rear wheel... was it a bolt-on conversion, or was there some mods involved? If you had to modify anything, what...
Sandman768,
Questions about the '82 RM465 rear wheel... was it a bolt-on conversion, or was there some mods involved? If you had to modify anything, what did you have to do to make it work? Also, what pipe/silencer combo did you have on that '79 RM250? Thanks.
I don’t remember it being a big deal, I may have had to add a large washer on the brake side, between brake hub & swingarm, but it was not a big deal. Much better hub design, the 79 hubs were junk. Here is a photo
Hudweiser9
Profile picture for user Hudweiser9
Posts
451
Joined
4/8/2014
Location
Ormond Beach, FL US
Hudweiser9 9/13/2022 3:36pm
9/13/2022 3:36pm
Sandman, if you come across a rear wheel for an '82 RM465, or know of one somewhere, let me know. This '80 RM400T is still a work in progress. Thanks in advance.

Post a reply to: 1980 RM400T Head / Cylinder torque spec...