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**_keerthy** · 09-15-2009, 10:24 PM

Yes, you are not supposed to use synthetic immediately after rebuild. Use castrol or mak or any other mineral oil.

**psycho 98** · 09-15-2009, 10:40 PM

Aravind any oil available in bunks are good for runnin, preferablly MAK 2T.
Your engine is yet to be done rite! why asking now ?

"Information is wealth" ah

**Raccoon** · 09-16-2009, 02:18 AM

Originally posted by itsarjun View Post

i guess mineral based oil is the oil you normally get at the pumps?
i've read somewhere that you're not supposed to use synthetic for the run in. Please advice

At pumps you will lucky if its even mineral...

So make sure whatever you buy only a sealed bottle or sachets. Better option would be to use Idemitsu, Gulf... you get these in sachets also. Later you can use VSX2, Petronas, Motul 510, Motul 800... in that order.

Btw, MAK 2t is supposed to be semi synthetic. In fact, I'm not too sure if mineral or semi-synth should be an issue wrt 2 stroke oils. It seems a 2t has to be semi synth to meet JASO FC requirements. So I'm inclined to say you could use any of the better oils mentioned above, right from the start, barring maybe Motul 800.

**Bladerunner** · 09-16-2009, 04:06 AM

Originally posted by itsarjun View Post

hi all,
my shogun has just been through a complete engine rebuild and am looking forward to breaking her in . . .
wanted to know if its advisable to use synthetic oils at this stage . . .
(any other tips for running in would be greatly appreciated, its my first time running in a two stroke you see . . .

)

Originally posted by arvindraju View Post

i had a Question on the same lines but for my 4-speed 135

is there any like mineral based 2t oil that be used during engine rebuilds of a 2 stroker till the run-in time ?

Originally posted by itsarjun View Post

i guess mineral based oil is the oil you normally get at the pumps?
i've read somewhere that you're not supposed to use synthetic for the run in. Please advice

Use Motul Motomix. Its a very good mineral oil.

While running in make sure you use engine speed to slow down. Its good for break in.

Don't rev the engine too much and try to stay below 50 km/h for the first 500 kms. After that try going up to 70 km/h and come back below 50 but don't cruise at any speed. Try changing speeds all the time. Never hold the throttle open constantly on a 2 stroke, even after running in. Use the throttle in a "on/off" method. After 800 kms try going up above 70 km/h.

After 1000 kms start using semi synthetic or synthetic oils.

**itsarjun** · 09-16-2009, 09:17 AM

Originally posted by Bladerunner View Post

Use Motul Motomix. Its a very good mineral oil.

While running in make sure you use engine speed to slow down. Its good for break in.

Don't rev the engine too much and try to stay below 50 km/h for the first 500 kms. After that try going up to 70 km/h and come back below 50 but don't cruise at any speed. Try changing speeds all the time. Never hold the throttle open constantly on a 2 stroke, even after running in. Use the throttle in a "on/off" method. After 800 kms try going up above 70 km/h.

After 1000 kms start using semi synthetic or synthetic oils.

I'm using premix on my bike, as there's no oil pump to supply oil when the throttle is in the completely off position, wouldn't the engine be starved of oil at that point?

i know that you have to keep changing throttle position on a two stroke, but in case there's no oil pump, shouldn't you avoid completely cutting off?

**Raccoon** · 09-16-2009, 03:33 PM

^^^ 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.

**psycho 98** · 09-17-2009, 02:37 PM

Originally posted by itsarjun View Post

I'm using premix on my bike, as there's no oil pump to supply oil when the throttle is in the completely off position, wouldn't the engine be starved of oil at that point?

i know that you have to keep changing throttle position on a two stroke, but in case there's no oil pump, shouldn't you avoid completely cutting off?

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.

Yupp nice obsevation if you close the throttle or you are on a downhill with throttle close this is what happens :

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.

**Raccoon** · 09-17-2009, 05:08 PM

^^^ 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.

**Nikhil Pereira** · 09-17-2009, 11:14 PM

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. . .simple

**Raccoon** · 09-18-2009, 01:12 AM

^^^ To the revs and throttle opening. Shutting off engine and coasting ain't a good idea.

**torqu3e** · 09-18-2009, 06:53 AM

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.

**itsarjun** · 09-18-2009, 09:07 AM

Originally posted by torqu3e View Post

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.

so does that mean that if I'm running premix, i shouldn't use engine braking?

**Raccoon** · 09-18-2009, 04:33 PM

Originally posted by torqu3e View Post

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.

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...

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?

**Shivanshu** · 09-18-2009, 04:51 PM

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 always

**atul_astro** · 09-18-2009, 10:59 PM

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

cheers

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