Oil pump id
Moderator: rztom
Oil pump id
Are theses the same oil pumps for a 4LO? One is labeled IMI; the other 4L1. Both came off RDs.
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Re: Oil pump id
the yellow paint usually means 350, (how long before people put yellow paint on 250 pumps tho?!) and I believe the codes dont mean anything in this context. Gary will be along soon...
80 XT500 Supermoto!
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid
Like Watches? www.PloProf.com & www.DeskDivers.com
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid
Like Watches? www.PloProf.com & www.DeskDivers.com
Re: Oil pump id
4L1 is RD350LC and RZ350
Re: Oil pump id
They are both 350 pumps, according to the paint (and only when used in conjunction with those pulleys). There is yellow on both. The 1M1 pulley is the early lc item, but can be used the same as the 4L1 pulley. The slopes and rise are exactly the same. The pump with the 1M1 pulley has the prototype steel insert type top casting in your photo. It's fine to use, but looks a little odd with its flat machined top surface. The other pump is also steel insert type top casting, but this one is the final development item.
Re: Oil pump id
Just wanted to ck Gary b4 fwd"ing them on to you - be in the mail mate. The 1M1 came off a 1980 LC - ur explaination makes sense. Look fwd to using one or the other next Summer!
Re: Oil pump id
Where is the 'like' button on this forum... sigh... what a post!Arrow wrote:They are both 350 pumps, according to the paint (and only when used in conjunction with those pulleys). There is yellow on both. The 1M1 pulley is the early lc item, but can be used the same as the 4L1 pulley. The slopes and rise are exactly the same. The pump with the 1M1 pulley has the prototype steel insert type top casting in your photo. It's fine to use, but looks a little odd with its flat machined top surface. The other pump is also steel insert type top casting, but this one is the final development item.
80 XT500 Supermoto!
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid
Like Watches? www.PloProf.com & www.DeskDivers.com
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid
Like Watches? www.PloProf.com & www.DeskDivers.com
- OldTZracer
- Posts: 240
- Joined: Thu Aug 05, 2010 2:21 am
- Location: Alberta Canada
Re: Oil pump id
One thing to keep in mind is, over the years these oil pumps had a couple of different internal ratios. Make sure you have the matching shaft, otherwise the wrong ratio worm drive will strip the teeth off the ring gear inside the pump. Ask me how I know...
"...its a 2-stroke ya twit - Its supposed to smoke..."
Re: Oil pump id
Thx for the 'heads up' on the matching shafts - I lablelled em as soon as I read you post! Stripped gear rings ... yikes, piston seizure on a rebuilt engine.
Re: Oil pump id
Relax Scott, you're in safe hands.LC Cnd wrote:Thx for the 'heads up' on the matching shafts - I lablelled em as soon as I read you post! Stripped gear rings ... yikes, piston seizure on a rebuilt engine.
Re: Oil pump id
I didnt know the 350 came with different shafts and ratios... hmm...
Gary, that pump you currently have of mine came from ebay shaft'less, I figured it would be ok as I have one here in my spares, but perhaps I'd better bring it with me when I see you? I'd better look it out, Ive a few months to locate it lol.
Gary, that pump you currently have of mine came from ebay shaft'less, I figured it would be ok as I have one here in my spares, but perhaps I'd better bring it with me when I see you? I'd better look it out, Ive a few months to locate it lol.
80 XT500 Supermoto!
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid
Like Watches? www.PloProf.com & www.DeskDivers.com
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid
Like Watches? www.PloProf.com & www.DeskDivers.com
Re: Oil pump id
No worries John. Norbo has the shafts as well now.
Lc cnd, nice photo.
Lc cnd, nice photo.
Last edited by Arrow on Sun Feb 11, 2018 3:45 pm, edited 2 times in total.
Re: Oil pump id
The very first 350lc has the same gear as the last Brazilian bike. I think tzracer was just refering to "other" pumps.JonW wrote:I didnt know the 350 came with different shafts and ratios... hmm...
Gary, that pump you currently have of mine came from ebay shaft'less, I figured it would be ok as I have one here in my spares, but perhaps I'd better bring it with me when I see you? I'd better look it out, Ive a few months to locate it lol.
Re: Oil pump id
Cool ta, that puts my mind at rest :)
80 XT500 Supermoto!
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid
Like Watches? www.PloProf.com & www.DeskDivers.com
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid
Like Watches? www.PloProf.com & www.DeskDivers.com