Pump or No Pump
'Learn by doing' is what is belive in, i hate the theory part.Consider this as practicals.
1) So go ahead and start the bike and make sure the engine stays on.
2) Remove the Oil tube from the carb (Only from the Carb).
3) When the engine is in idle mode you will not notice any oil coming out of the tube that is because rate of Oil pumping will be slow.
4) Now start reving the engine slowly, as the fuel flow increases in to the carb, 2T oil will be oozing out of the tube.
When the throttle is increased the 2T flow in to the carb will also be increased.
This is what i have practically checkedout.
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@ Yamahatropper
From personal experience am telling you . 40 ml per liter is not good .
Use 25-30 ml per liter . Take others advice also like pyscho
and others . Just telling you what i experienced 
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@ raccoon
Good to see you take talks so lightly even in not so good cases .
cheers palsLeave a comment:
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^^^ Don't want to sound like an oil pump by repeating things (been discussed before), but you seem to have missed the most important point - the pump is there to reduce your 2t usage without compromising on the lubing needs!
A very small amount of 2t in the fuel tank is enough to keep it from rusting.Leave a comment:
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Could nt help meself from jumping into this debate.
Well i feel using the oil pump provided there are no blockages in the pipes ensures a optimum amount of 2T oil for the mix but if the owner is careful with the amount of 2T is a petrol oil pre mix and uses a funnel to fill in the petrol oil mix into the tank it should be allrite. And loose 2T is a obviuos NO. I ensure that i go to a pump that sells Mak 2T and use 40 ml to each liter and that seems to working fine on MegaReX. Cos ultimately the oil from the oil pumps ends up getting premixed at the carb anyways.
Other than that the one advantage I can see of using 2T oil in the oil tank over a pre mix is that its more convienient for us kind of guys cos we want the best for our bikes and can get the choice of filling in a good oil of our choice like JetX or Yamalube or whatever and not having to carry a can of 1 liter 2t every time we need to gas up.
But then again 2T in the tank sometimes, helps to keep the insides of the tank healthy.
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^^^ Heheheheh... lol! Whats wrong with a bit of confusion... esp. when everyone (mebbe including myself) is pretty smug about what they know?
Atul Astro, I'm seriously not preaching anything. Sorry if it somehow sounded like that. Pump or otherwise, its the owner's baby and his decision. Other than the matter of pumping some more pre-mixed pollution+air into others lungs, it shouldn't concern anybody. I thought we were only exploring the pros and cons of both.
Last edited by Raccoon; 09-19-2009, 01:32 AM.Leave a comment:
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i see you're a huge oilpump fan raccoon..and i respect that..but please try to not make your post sound like your dissing the premix guys and sound a lot like a oilpump itself :P
dont take my post in the wrong sense man..i read all your posts and it did sound like a bit of preaching
peace
cheersLeave a comment:
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Even i own a rx, and about the oil pump if you notice it in details the pump flow depends upon the throttle...so what I do when i go for long ride is to rev the throttle a bit when going on constant speeds as the up n down movement of wire is directly linked to the pump...so basically that way it pumps more oil...... I may be wrong bt it seems to have helped alwaysLeave a comment:
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Dunno for sure about other bikes, but Shogun definitely has the pump linked to the RPM + throttle position. I thought it must be similar for the RX...Originally posted by torqu3e View Post
As for pulling in the clutch when in gear, to coast at high revs... somehow I don't have a good feeling about this. Also, it might lead to bit more clutch wear.
One more issue - I find that with clutch fully pulled in and bike on center stand and bike idling in any gear, the rear will will start spinning. First I thought it was only a problem with my bike.... but later I found the same with other bikes! This seems to suggest that the clutch is not completely disengaging... or at least there is still sufficient friction between the plates to transfer some minimal power to the wheels. Would this mean that the plates will undergo some friction when clutch is pulled in and you are coasting at speed? Can anybody comment?
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OK, let me clarify this.
Only TZRs and beyond came with oil pumps which pump depending on throttle position + rpm.
RX pumps only pump based on throttle position.
Running premix, its not a good idea to keep the engine at high revs with the throttle closed. The lubrication ain't enough.
What I do is, if I am doing 9500 revs in top gear and i have to cut the throttle, i just pull in the clutch and let the revs drop.Leave a comment:
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^^^ To the revs and throttle opening. Shutting off engine and coasting ain't a good idea.Leave a comment:
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If im not mistaken the pump is connected to the revs and not to the speed.so coast down even at 150kmph with the engine idling it wont matter.if u are owrried about this fact then simply shut of ur engine n coast downhill. . .simpleLeave a comment:
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^^^ Yes but the concern is, while using pre-mix, is the lubing enough if you are coasting downhill at high speeds? With the pump of course, this wont be a matter of concern.
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Originally posted by itsarjun View PostYupp nice obsevation if you close the throttle or you are on a downhill with throttle close this is what happens :Originally posted by Raccoon View Post^^^ Hmmm... interesting point! Well, unlike MPFI cars, the petrol supply would never be zero in a carbed bike. So some oil will be supplied... but then question would be is this oil sufficient to lube the engine when say you are coasting downhill at 100 kmph with throttle closed... I'm not sure. Maybe thats why the oil pump is provided.
1) The carb has idling set eg: 1000/1500 rpm .
2) The moment to you close the throttle the carb starts idling.
3) The moment the carb idles there is fuel/oil suplied to the engine.
4) Lets say there is no fuel supplied when the throttle is applied the engine will conk off.
5) Any body wants to check this can set the carb to zero idling and once u reach downhill close the throttle, bike will jerk and conk off in matter of seconds this happens when you do this without holding the clutch.Leave a comment:
on this.
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