GoldStar Silencer

[ArizonaJim]

In my opinion it is dangerous to change the exhaust silencer on a motorcycle with a carburetor on it unless you, or your mechanic are very experienced in changing carburetor jets.

Any reduction in the exhaust gas pressure will change the way the engine breaths thru the carburetor. This almost always results in the engine running lean with too little gasoline being added to the air supply.

That can not only change the power output, in some cases making it better but often making it worse, but it can result in burning the exhaust valve and its valve seat.

Acclero should have his engine compression checked. I'm betting that it is low due to a burned exhaust valve.

Changing carburetor jets is not for the beginner. It is a long, drawn out process because there are several different things inside a carburetor that can be adjusted.
Only the right combination will give full power without causing engine damage.

The Fuel Injected models being exported to the USA have an oxygen sensor (O2) in the exhaust pipe just outside the cylinder head and the computer will use this to recognize the lean burning condition if a low restrictive silencer is used, so a special one called an EFI Silencer is sold for that motorcycle.
NField Gear: Premium Silencer for Fuel Injected Royal Enfield Motorcycles
Although the link is to the American Royal Enfield site I believe Hichcock in England is the supplier of this silencer.

Using this O2 exhaust gas reading the computer will adjust the fuel mixture to correct it to the proper ratio when this silencer is installed.

Royal Enfield does not recommend using a megaphone or other open silencers even on the fuel injected models because there is a limit to how much the computer can adjust.

As for the fuel injected models sold in India, they have no way of sensing the exhaust gas because they do not have an O2 sensor. Without this sensor their computer has no way of knowing that things need to be changed to correct the fuel/air ratio so here again, there is a good possibility that the fuel/air ratio will be too lean.

Perhaps there are silencers approved by Royal Enfield for their Indian models but I would bet they are produced by Royal Enfield, not by some other small maker who doesn't have access to the engineering knowledge that would make their product compatible.

[bikham]

Originally Posted by sans

We will be working on tail gunner by April End.

I am more and more confused now with which one to go for my DS500 .Whats the stats of tail gunner.

[MCRPM]

Riders,

I recently got a custom Goldie done on my C500. The Goldie is made out of the Stock Straight exhaust which comes with the C500 .

The issue I am facing is After-fire (While deceleration). The cracking sound comes very regularly during deceleration. Otherwise all looks good.

Are there any problems that I could land up in because of this ? Some say in EFI engines , you dont need to worry much...

Also any suggestion on the fixes ?

[tharian]

Originally Posted by MCRPM

Riders,

I recently got a custom Goldie done on my C500. The Goldie is made out of the Stock Straight exhaust which comes with the C500 .

The issue I am facing is After-fire (While deceleration). The cracking sound comes very regularly during deceleration. Otherwise all looks good.

Are there any problems that I could land up in because of this ? Some say in EFI engines , you dont need to worry much...

Also any suggestion on the fixes ?

For the 'back-firing' , check for leaks at the head were the pipe joins the engine head and also at the joint the bend pipe is screwed to the muffler. Sometimes this can cause pop sounds on deacclerating.

Also, if you could, please post a picture of the exhaust as I am curious how a stock muffler was converted to a free flow one.

[ruchirtnt]

Originally Posted by ArizonaJim

Royal Enfield does not recommend using a megaphone or other open silencers even on the fuel injected models because there is a limit to how much the computer can adjust.

As for the fuel injected models sold in India, they have no way of sensing the exhaust gas because they do not have an O2 sensor. Without this sensor their computer has no way of knowing that things need to be changed to correct the fuel/air ratio so here again, there is a good possibility that the fuel/air ratio will be too lean.

Oops, i really missed this comment and using megaphone from a long time on my DS500, i think i better get rid of this

[mshooli]

Hello All,

Need an advice here. I have a 2010 Electra 5S with a RE showroom fitted short bottle silencer. I want to now go in for the Goldstar silencer. The SANS Goldstar is priced at Rs. 1700/- while the one being sold at the official RE service center is Rs.3800/-. Is there any difference between the two ? And is it worth buying the Goldie from the RE folks ?

[abeerbagul]

I have a SANS goldstar fitted onto my Classic 500, using it for past 10000 kms. It was fitted the moment running in was over.

Till now, no issues, either of power or mileage. The look is very "British" and sound is awesome. It is mute in traffic, and opens up on highways. It does pop on rapid deceleration, but I like that.

I dont think the dealer's silencer would have any extra technical improvement, for all you know it might be the same internally.

[Blazkowicz]

Originally Posted by mshooli

Hello All,

Need an advice here. I have a 2010 Electra 5S with a RE showroom fitted short bottle silencer. I want to now go in for the Goldstar silencer. The SANS Goldstar is priced at Rs. 1700/- while the one being sold at the official RE service center is Rs.3800/-. Is there any difference between the two ? And is it worth buying the Goldie from the RE folks ?

The RE guys seem to be charging you quite a premium for the silencer. Try to find out which Goldstar is that. In any case, the SANS Inc Goldstar is a great silencer. It now comes in two variants, one with glass wool costing around 2300 and another one with conical baffles which costs 1700. The glass wool version gives a bassier thump and is somewhat quieter than the one with conical baffles but it does cost more. Since you have a CI bullet, thump shouldn't be an issue and you can opt for the cheaper variant.

[mshooli]

Originally Posted by Blazkowicz

The RE guys seem to be charging you quite a premium for the silencer. Try to find out which Goldstar is that. In any case, the SANS Inc Goldstar is a great silencer. It now comes in two variants, one with glass wool costing around 2300 and another one with conical baffles which costs 1700. The glass wool version gives a bassier thump and is somewhat quieter than the one with conical baffles but it does cost more. Since you have a CI bullet, thump shouldn't be an issue and you can opt for the cheaper variant.

Mine is a 2010 Electra and comes with the UCE engine. So thump is a bit of an issue here.

I had been to the RE service center to pick up my bike today and I once again enquired about the price and make. The price is 3200/-. I must have heard it wrong the last time. But even then this is pretty high.They did not tell me anything about the make. I was just told that they procure it from outside. I think I will go with the SANS Inc. glasswool variant. Thanks for your suggestions.

[sans]

Hey guys
Am happy to see you all delighted with our goldstar Exhausts.
It makes us a feel motivated and enables us to word harder for a better thumping World.
Do let me know in case you have any doubts.

[sheshgiri.kini]

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[TaurusAl]

Originally Posted by sans

Hey guys
Am happy to see you all delighted with our goldstar Exhausts.
It makes us a feel motivated and enables us to word harder for a better thumping World.
Do let me know in case you have any doubts.

Any options for the new TBTS 350 ? The service guys told me the silencer is one piece and just the exhaust cannot be changed. If at all, one will have to change the whole assembly right from the bend pipe.

[sans]

Originally Posted by TaurusAl

Any options for the new TBTS 350 ? The service guys told me the silencer is one piece and just the exhaust cannot be changed. If at all, one will have to change the whole assembly right from the bend pipe.

Hi Buddy
Please see the Goldstar with conical baffles for new TBTS 500.
We guys might be the first ones in India to manufacture the exhaust for New TBTS.

[TaurusAl]

Originally Posted by sans

Hi Buddy
Please see the Goldstar with conical baffles for new TBTS 500.
We guys might be the first ones in India to manufacture the exhaust for New TBTS.

Thanks, looks great.

Some questions -

1) Is the original bend pipe cut to weld this one ? (I can see a welding park)

2) Is this one a free flow ?

3) What is the difference between concial baffles & Glasswool in terms of performance and sound ?

[sans]

Originally Posted by TaurusAl

Thanks, looks great.

Some questions -

1) Is the original bend pipe cut to weld this one ? (I can see a welding park)

2) Is this one a free flow ?

3) What is the difference between concial baffles & Glasswool in terms of performance and sound ?

Some Answers :-
1. No its not cut.Only the heat shield is removed.
2. It has Conical baffles
3. Both of them are different in sound.The conical one gives treble and bass combo while the glasswool one just gives the bass.

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