Mercedes Primary Chains

[Stoutgoose]

There is no interval for changing the primary on twins as you've noticed.
The one on my long suffering SF2 probably has around 130 000 km. I see no reason to change it though I'll do so if I rebuild the engine.

Check regularly however the camchain tensioner wheel.

Paul

I’m talking about my RGS here Paul rather than my twin. Primary replacement is at 16400 miles, but no mention of replacing timing chain at any mileage. Seems a bit strange?

 

[The Sock]

I’m talking about my RGS here Paul rather than my twin. Primary replacement is at 16400 miles, but no mention of replacing timing chain at any mileage. Seems a bit strange?

The Primary chain carries every little torque and geegee, along with some pretty powerful pulses, that the engine can produce.
The camchain is barely loaded in comparison.

 

[Stoutgoose]

I usually use Slaters, however any recommendations on the best place to buy a primary chain tensioner?

 

[LJ-2]

Slaters parts buyer surfaced at last here, think there is a min spend of £40.00

Moto Laverda Parts

 

[Paul Marx]

I’m talking about my RGS here Paul rather than my twin. Primary replacement is at 16400 miles, but no mention of replacing timing chain at any mileage. Seems a bit strange?

Cam chain is a 25 - 30 000 km replacement interval if I remember correctly.

Paul

 

[Andy]

Andy the Chain Man pointed out the conventional wisdom that a worn chain wears the sprockets. If the sprockets are hard to come by or difficult to replace, then it’s a good idea to replace the chain more often.
Opinions are a little divided however because as said, the timing chain wears very slowly.
I did mine as a precaution and to see how easy it was

Also I live in NZ and own some sheep, therefore now that we have a trade deal with the UK money is no object

 

[chrisk]

Why do you recommend deleting the inner row of crank and clutch sprocket teeth in case of using the duplex chain, rather than the outer row?

Paul

Is that a serious question?

There is enough room for two plates between the teeth, not enough for four.

 

[Paul Marx]

Is that a serious question?

There is enough room for two plates between the teeth, not enough for four.

Yes. I put my chains on the inner two rows so as to limit the effect on the shafts, and I leave the teeth where they are but on his site, Steve recommends mounting the chain outboard.

Paul

 

[Dellortoman]

Is that a serious question?

There is enough room for two plates between the teeth, not enough for four.

Is that a serious answer? I think you must be imagining 2 x simplex chains on adjacent rows of teeth, which is not possible. But that wasn't what Paul was asking about.

 

[chrisk]

Is that a serious answer? I think you must be imagining 2 x simplex chains on adjacent rows of teeth, which is not possible. But that wasn't what Paul was asking about.

That was what I was getting at, but clearly I was mistaken as to what Paul was asking in the first instance ........

 

[Stoutgoose]

I have ordered a new timing and primary chain from Jason, however what are your thoughts on the current timing chain? It is marked ‘made in England’ on every link and is, I am guessing here, not original?

 

[sfcpiet]

First of all, the spring clip is fitted on the wrong side...

No, not OE, originally Regina chain would have been fitted. "Made in England" need not be a bad thing, possibly Renolds brand. A chain cannot be properly assessed from a couple of pics.

piet

 

[The Sock]

 

[Stoutgoose]

Is there a serious issue with it being fitted on the
other side?

 

[sfcpiet]

Is there a serious issue with it being fitted on the
other side?

Yes.

piet

 

[Paul Marx]

Is there a serious issue with it being fitted on the
other side?

I learnt this from Mr Sock who posted the factory drawing.
There is a real risk that on the wrong side, the spring link get's knocked off whilst at the bottom of it's travel.

Paul

 

[Stoutgoose]

Thanks; not good. This chain has been on for 40k or so, so fortunate it hasn’t broken.

 

[lawrence]

Just to be 100% clear here, the spring clip should be fitted on the left side of the cam chain, as seen when the rider is seated on the bike? In post #33, the clip is on the left, but the photos posted earlier seem to show the clip on the left as well.
Both Mirages I've owned have had it fitted on the right side.

 

[Paul Marx]

Just to be 100% clear here, the spring clip should be fitted on the left side of the cam chain, as seen when the rider is seated on the bike? In post #33, the clip is on the left, but the photos posted earlier seem to show the clip on the left as well.
Both Mirages I've owned have had it fitted on the right side.

No, clip is on the right in the photos.

20A8F3D3-E625-4E59-BB30-5D660E2265BA.jpeg​

Paul

 

[Dellortoman]

There is a real risk that on the wrong side, the spring link get's knocked off whilst at the bottom of it's travel.

I've not heard about this before. What monster lurks in the sump that knocks spring clips off?

I wouldn't have a clue which side my spring clip is on without opening the cam cover and having a look.