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Post by organic3 on Jan 27, 2019 20:56:41 GMT 1
hi all i've neally finished putting my 350lc back together but i've started doing the cable for the oil pump but ive noticed its a 4L1 and not a 4LO does that matter having a 4L1 oil pump in the bike will it feed the same amount of oil into the carbs i've hadf a quick look about for a 4L0 oil pump has anyone got a good working spare one on this forum for sale.
thanks neil.
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Post by kostas on Jan 27, 2019 21:00:37 GMT 1
How do you know you have a 4L1 pump??
What’s written on the pulley doesn’t matter.
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Post by kostas on Jan 27, 2019 21:01:32 GMT 1
A yellow paint mark on the pump split line screw will tell you that you have a 4L0 pump
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Post by stusco on Jan 27, 2019 21:17:00 GMT 1
Red paint for 250
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Post by organic3 on Jan 27, 2019 21:27:57 GMT 1
where the cable connects to it its got 4L1 stamped on there theres no yellow paint on the pump
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Post by alankelly on Jan 27, 2019 21:32:59 GMT 1
Also as far as I know the oil pump drive worm is different for a 350 (more corse) so if you can always pull the pump and compare with online images as the 350 worm has less turns due to a more corse thread if no other ID marks are present?
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Post by markhoopy on Jan 27, 2019 21:47:20 GMT 1
where the cable connects to it its got 4L1 stamped on there theres no yellow paint on the pump 250 and 350 pumps are both marked 4L1. Can you see any paint at all on or near one of the four screws that hold the pump together? |
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Post by organic3 on Jan 27, 2019 22:23:34 GMT 1
theres a bit of red paint by the front bottom screw
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Post by kostas on Jan 27, 2019 23:16:35 GMT 1
Take the pump and worm drive off, only way to be sure.
The 250 pump will deliver less oil than you need.
Arrow on here can tell you what you’ve got.
Kostas
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Post by alankelly on Jan 27, 2019 23:34:35 GMT 1
Hi you can take the oil pump off and leave the side case in place if you have already fitted the side case and filled with oil etc, as the worm drive is fully exposed when you withdraw the pump and then take a couple of photos and post as I am sure arrow will be able to tell you and if it is an old pump you may want to consideri getting it service by arrow as part of your rebuild as it is a critical part. He rebuilt mine and the guy is top notch
Best wishes Al
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Post by rigga on Jan 27, 2019 23:44:17 GMT 1
theres a bit of red paint by the front bottom screw 250 pump .... also can't just fit a 350 pump as the drive needs changing to match the internal worm gear of the pump. |
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Post by markhoopy on Jan 28, 2019 0:08:18 GMT 1
theres a bit of red paint by the front bottom screw 250 pump .... also can't just fit a 350 pump as the drive needs changing to match the internal worm gear of the pump. +1 and +1 on sending your oil pump to Arrow to be checked over and set up, but as others mention above you will need to source a 350 pump and drive as the one you have will not deliver enough oil for your engine. |
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Post by organic3 on Jan 28, 2019 10:59:05 GMT 1
does anyone know of someone selling a good working order 350lc oil pump and worm
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Post by Shytalk on Jan 28, 2019 14:38:20 GMT 1
does anyone know of someone selling a good working order 350lc oil pump and worm Contact Arrow on here he should have some rebuilt and ready to go. |
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Post by supermoto57 on Jan 28, 2019 14:47:43 GMT 1
Like previously said only one guy for oil pumps ...ARROW.contact him he is top bloke.i just had 2 pumps refurbished by him 👍👍👍
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Post by marrcel on Jan 28, 2019 14:53:48 GMT 1
Same here Arrow did 2 pumps for me. Top job.
I can give you a tip. Ask Arrow if he wants to swop pumps. You never know. Succes.
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Post by organic3 on Jan 28, 2019 20:09:04 GMT 1
ok thanks ill give him a try
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Post by JonW on Feb 4, 2019 2:15:48 GMT 1
Arrow has dome all my 250/350 pumps, hes a magician that can turn ugly sh1t into what seems like a new pump, and the bonus is it works properly after. Hes also a top bloke too. I wish I could find someone to refurb my 500 pump in the same way he does the smaller bikes.
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Post by kostas on Feb 4, 2019 22:24:23 GMT 1
Arrow has dome all my 250/350 pumps, hes a magician that can turn ugly sh1t into what seems like a new pump, and the bonus is it works properly after. Hes also a top bloke too. I wish I could find someone to refurb my 500 pump in the same way he does the smaller bikes. I would say the same about my RGV pump.. |
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Post by pdxjim on Feb 5, 2019 6:38:12 GMT 1
Just wanted to pop in and say I reached out to Arrow via PM with a stupid newbie question, and he was nothing but kind and thorough with his multiple replies.
Top Bloke who'll be getting my biz when it's time for an oil pump rehab.
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Post by nige350lc on Feb 24, 2019 15:07:04 GMT 1
Hi My RD350LC 4L0 Oil Pump seems to be feeding the right cylinder fine, but the pipe to the left cylinder has air bubbles in it which is a bit alarming. Can any of you suggest what the problem may be and how to fix it? Previous owner fully rebuilt the engine, new everything, crank, pistons, rings, rebored, seals etc etc and the pump looks new.
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Post by arrow on Feb 24, 2019 16:42:18 GMT 1
Firstly, you have the outlet pipes crossed over. That doesn't really matter, except for diagnostic purposes. The check valves are passing or at least the side one is and the tiny piston seal is shot. The air will show up worse in the side outlet when the piston seal is shot, but only if the check valve(s) are passing.
Time for a strip down.
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