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**Aryan** · 07-04-2009, 12:20 AM

Query Approved.

**Chinmay Dangre** · 07-04-2009, 01:26 AM

Actually there is one small hole for the cap for ATM pressure. But if the leakage is too much then check the lid rubber packing. Well bullet is known for leakage.

A big Barrel engine takes time to start, especially bullet yes. The moisture content kills the efficiency of AF. It happens mostly and generally during cold weather. So not to worry.

But if your vehicle is starting without choke in any weather that means your bike is draining lot of fuel at first.

The recommended oil for Bullet 350 CI engines is
Engine Oil >> 20W50, Veedol/Motul, 2.250ml.
Clutch Oil >> 10W30 JASO MA/MA2 complaint. 420ml
Gear Box Oil >> EP-90, 500ml.
Read your owners manual.

**johnplayer** · 07-04-2009, 01:49 AM

Thanks a lot Chinmay. It really helps. I am starting to know my bike.

**blackfire_9** · 07-05-2009, 11:20 PM

Originally posted by Chinmay Dangre View Post

AIS. So check the AIS vacuum pipe. Generally bullet has got that problem within few hundred kilometers. Or else you can shut down the AIS by blocking it. Ask your mechanic to do that. If no one knows then ask me I will post the pic for that.

Actually there is one small hole for the cap for ATM pressure. But if the leakage is too much then check the lid rubber packing. Well bullet is known for leakage.

A big Barrel engine takes time to start, especially bullet yes. The moisture content kills the efficiency of AF. It happens mostly and generally during cold weather. So not to worry.

But if your vehicle is starting without choke in any weather that means your bike is draining lot of fuel at first.
u should get avg around 40-45-48. Well frankly avg is depending on riding style, also.

The recommended oil for Bullet 350 CI engines is
Engine Oil >> 20W50, Veedol/Motul, 2.250ml.
Clutch Oil >> 10W30 JASO MA/MA2 complaint. 420ml
Gear Box Oil >> EP-90, 500ml.
Read your owners manual.

I had Authorised Service Point for RE product for few years. But I left it 1-1/2 yr back... So I know bulls very well.

Hi Chinmay,

Can you please throw some light on what AIS is, I have not heard of it & it would help if you can explain just for the sake of adding it to my knowledge.

This is way too much mileage for a 350cc CI engine, & might do harm to the engine. It may be running lean if one is getting such a mileage.

Happy thumping,
Prakhar

**Chinmay Dangre** · 07-08-2009, 11:21 AM

Originally posted by blackfire_9 View Post

Hi Chinmay,

Can you please throw some light on what AIS is, I have not heard of it & it would help if you can explain just for the sake of adding it to my knowledge.

This is way too much mileage for a 350cc CI engine, & might do harm to the engine. It may be running lean if one is getting such a mileage.

Happy thumping,
Prakhar

Hey Prakhar , sorry for very late reply. My xbhp account was not allowing me to enter from few days. since I got the succccccc today.. Anyways... AIS = Air induction system, In bullet it is called pulse system which is fitted on head on the left hand side. The function of this system is to avoid pollution. due to norms all the manufacturer started utting this device in all four stroke engines. In the exhust engine emites "CO" that means carbon monoxide which is harmful to our health, so manufacturer made arrangment such a way that the exhaust emits CO2...How u wanna know more?
K here u go. At every exhaust pulse AIS take one molecule of "O" from air filter and mix it with exhaust "CO" so at the end it becomes CO2, check the reaction
"CO + O = CO2".. So overall the kit is for emission controlling. In performance u don't need emission controlling kit for sure. Secondly specially in bullet when u shut down the AIS the avg. of the motorcycle gets increased rapidly. And carb gets tuned perfectly without any misfiring...This is my general reading during when I had my authorised service point for RE....Hope you got the info now....

**blackfire_9** · 07-08-2009, 12:27 PM

Originally posted by Chinmay Dangre View Post

Hey Prakhar , sorry for very late reply. My xbhp account was not allowing me to enter from few days. since I got the succccccc today.. Anyways... AIS = Air induction system, In bullet it is called pulse system which is fitted on head on the left hand side. The function of this system is to avoid pollution. due to norms all the manufacturer started utting this device in all four stroke engines. In the exhust engine emites "CO" that means carbon monoxide which is harmful to our health, so manufacturer made arrangment such a way that the exhaust emits CO2...How u wanna know more?
K here u go. At every exhaust pulse AIS take one molecule of "O" from air filter and mix it with exhaust "CO" so at the end it becomes CO2, check the reaction
"CO + O = CO2".. So overall the kit is for emission controlling. In performance u don't need emission controlling kit for sure. Secondly specially in bullet when u shut down the AIS the avg. of the motorcycle gets increased rapidly. And carb gets tuned perfectly without any misfiring...This is my general reading during when I had my authorised service point for RE....Hope you got the info now....

Hi Chinmay,

Thanks for the reply buddy, & even I had faced a similar problem with my account here till yesterday.

I had thought you were referring to the PAV, but then the name sounded very different & hence wanted to confirm, & yes you are right, pollution control.

The increase in mileage part, although I am not aware of it but I think it could be attributed to the reduction in the temparature of the engine, spcially of the head & exhaust manifold regions (in Bullets, the bend pipe). And with the setup functioning the carburettor setting has to be a little lean, as otherwise it would result in excess heat so mch so that it can damage the exhaust valve owing to it's close placement to the head.

All in all, I have felt that the setup is not of much use, RE could have done some more R&D & come up with a better idea to curb emissions.

Anyways Chinmay, take care.

Happy thumping,
Prakhar

**Chinmay Dangre** · 07-08-2009, 03:10 PM

Originally posted by blackfire_9 View Post

Hi Chinmay,

Thanks for the reply buddy, & even I had faced a similar problem with my account here till yesterday.

I had thought you were referring to the PAV, but then the name sounded very different & hence wanted to confirm, & yes you are right, pollution control.

The increase in mileage part, although I am not aware of it but I think it could be attributed to the reduction in the temparature of the engine, spcially of the head & exhaust manifold regions (in Bullets, the bend pipe). And with the setup functioning the carburettor setting has to be a little lean, as otherwise it would result in excess heat so mch so that it can damage the exhaust valve owing to it's close placement to the head.

All in all, I have felt that the setup is not of much use, RE could have done some more R&D & come up with a better idea to curb emissions.

Anyways Chinmay, take care.

Happy thumping,
Prakhar

Well most of the time I have seen when the pav is active the carburetor body becomes very much black due to carbon content. but when i shut down the PAV system all things goes perfectly. The wrong entry time cozing carburetor black. besides after shutting pav I refer and prefer company recommanded settings for carburetor. If the AF screw Idling screw and aux screw set perfectly then avg becomes perfect and vehicle runs very smoothly.
Besides talking about RE R&D, omg forget it.....

**blackfire_9** · 07-08-2009, 06:20 PM

Originally posted by Chinmay Dangre View Post

Well most of the time I have seen when the pav is active the carburetor body becomes very much black due to carbon content. but when i shut down the PAV system all things goes perfectly. The wrong entry time cozing carburetor black. besides after shutting pav I refer and prefer company recommanded settings for carburetor. If the AF screw Idling screw and aux screw set perfectly then avg becomes perfect and vehicle runs very smoothly.
Besides talking about RE R&D, omg forget it.....

Hey Chinmay,

Well, the carburettor thing may be attributed to the fact that it's reed valve functions with the help of a single vaccum line from the carburettor & may be it is after all not a very good job at Enfield's end.

Hey Chinmay, by the way wanted to know if you had any manuals or technical documents that you won't mind sharing. I would love to know more about stuff related or unrelated to Bullets but engines & automobiles in general.

Nice talking to you buddy.

Take care.

Happy thumping,
Prakhar

**manpreet09** · 07-09-2009, 11:12 AM

I have bullet standard. 1300 Kms on odo. Should i block PAV and put short bottle silencer now or i should wait and complete run-in period and complete 3000 Kms and then do these modifications?

I have asked many bulleteers and mechanic every 1 has different view.

Please suggest.

**Chinmay Dangre** · 07-10-2009, 12:37 AM

Originally posted by blackfire_9 View Post

Hey Chinmay,

Well, the carburettor thing may be attributed to the fact that it's reed valve functions with the help of a single vaccum line from the carburettor & may be it is after all not a very good job at Enfield's end.

Hey Chinmay, by the way wanted to know if you had any manuals or technical documents that you won't mind sharing. I would love to know more about stuff related or unrelated to Bullets but engines & automobiles in general.

Nice talking to you buddy.

Take care.

Happy thumping,
Prakhar

Well I have loads of documents with me, sharing it with you I have no probs but how is the big question......send your test mail to me at [email protected]

**Chinmay Dangre** · 07-10-2009, 12:41 AM

Originally posted by manpreet09 View Post

I have bullet standard. 1300 Kms on odo. Should i block PAV and put short bottle silencer now or i should wait and complete run-in period and complete 3000 Kms and then do these modifications?

I have asked many bulleteers and mechanic every 1 has different view.

Please suggest.

Don't worry you can shut down the pav system. but remember one thing don't remove the vacuum pipe from carburetor. that will shoot the RPM and u will loss the power. Keep the PAV vacuum pipe as it is. For shutting the PAV use 1 small ball bearing from CONE set and put in between head nut and pav connecter which is fitted on head from left hand side. It will be off. And can be roll back in amin. if you want to start the PAV.

**johnplayer** · 07-22-2009, 11:02 PM

I had my first servicing and thought the problems would go away, but looks like the fellows in RE center in Noida is not competent enough.

The average is still 25kmpl and after running for 30-40 mins, the pickup seems to go away. It appears as if there is some obstruction.

I intend to get an early service but does anybody know a good service center in NCR?

Also, can you provide more info about the AF screw, the Idling screw and the aux screw. I can see 2 screws near the air filter on the right hand side, but do not know which is which and how to adjust them. I tried to turn one of them and the RPM increased.

Thanks for the help.
- Vaibhav

**Chinmay Dangre** · 07-22-2009, 11:43 PM

Pav

How does PAV works?
Here is the explanation,
Well,
1) Exhaust port emits "CO".
2) Air filter filters lot of things but also content "O"
3) PAV works on each pulse of intake stroke. When piston do the suction Vaccum goes on high level so PAV opens the valve due to vaccum. PAV is depending on Vaccum.
4) Pav take one molecule of "O" and adds in exhaust pipe.

"CO" = carbon monooxide << harmful
"CO2" = carbon diaoxide <<harmless
so the checmical equation is "CO + O = CO2"
CO2 means carbon diaoxide which is coming out of silencer.
Correct me If I am wrong....
Besides I feel it should help to stop misfiring if we are using free flow canister. Coz if the stock silencer is on the machine then it is giving problem. But in free flow due to lack of backpressure the adding of PAV means it should stop vaccum problem in the canister..I will let u know about this more later on let me check first then will inform...

**johnplayer** · 07-25-2009, 04:21 PM

Hi,

I will get the PAV blocked when I go for servicing next. However, I wish to understand more about the tuning screws. Can anyone please explain how to tune using these and if possible paste some pictures. The problem is that there are 2 screws I see and it would require some knowledge before I touch it.

Also, what is meant by "bike is running lean"? Is there any disadvantage to this?

Thanks,
Vaibhav

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