Correct Chain Setting!

[tim100]

Hi all. I was just wondering if any of you fellow street owners had noticed whether your chain was catching the swing arm. I found some damage to the powder coating (through to the alloy) when cleaning the bike, that has definitely been caused by the chain. The chain was within the 35-40mm slack as recommended in the manual but i'm wondering if it may be some design fault?

[CODE13]

Hi Tim,

Sorry to hear about the chain slap. I've got a little over 2000 miles racked up so I've been diligent about chain maintenence, lube and adjustments. I just checked my swingarm for signs of chain slap, nothing. What part of the swingarm got nicked? Do you have any pics?

Code

[FAZMAN]

Hi
The chain slack should be 20-25mm on the street and 35-40mm on the daytona, mine was also very slack when I got it, adjust it up and it should then be ok.

[Shakey]

Originally Posted by FAZMAN

Hi
The chain slack should be 20-25mm on the street and 35-40mm on the daytona, mine was also very slack when I got it, adjust it up and it should then be ok.

+1. Right around 1" max is the correct slack (.78-.98"). Mine was improperly adjusted when delivered as well. Might have something to do with the dealer not having received shop manuals for the Street at the time it was released. They were and may still be working off Daytona manuals in many cases.

[tim100]

Thanks for the info everyone. My manual just said 35-40mm with no distinction between the Street or Daytona, hence i assumed it was within limit. As a result it seems to have cut an approx 70mm crease just from the inner edge of the chain.The dealer photographed it and sent the pic to Triumph. Anyway, its tightened up now.

[arkle]

Originally Posted by Shakey

+1. Right around 1" max is the correct slack (.78-.98"). Mine was improperly adjusted when delivered as well. Might have something to do with the dealer not having received shop manuals for the Street at the time it was released. They were and may still be working off Daytona manuals in many cases.

Hang on a minute, is this really correct? 1 inch? Mine came from the shop at 35-40mm and remains so. My handbook says 35-40mm. Do you have an official source for the 25mm value?

arkle

[FAZMAN]

Hi tim100
Yes info is straight from the owners manual, tried to paste it put won't let me paste a pdf.

Ok everyone try this link http://www.triumph.co.uk/media/Dayto..._OHB_UK(1).pdf its directly to the triumph website available for anyone to view so no copyright infringements. Hope this makes it clear. ( Page 82 )

[Diego]

FAZMAN and Shakey are correct! The printed manual most of us received with our bikes is the first edition, which apparently did not include the separate chain spec for the Street Triple. The second edition, dated April 2008, carries this information:
.

Chain Free-Movement Adjustment

For Daytona 675, the vertical movement of the drive chain must be in the range 35 - 40 mm.

For Street Triple, the vertical movement of the drive chain must be in the range 20 - 25 mm.

.
Thanks, FAZ, for bringing this to our attention! This information will save needless wear on countless chains, sprockets, and swing arms.

I think it also explains a lot of the concerns folks have had with throttle free play, which by rights ought to have been a lesser issue on the Street than the Daytona, with its hotter engine. Turns out it's actually because most of us Streetsters have been running with too much chain slack all along!

I believe I will change the title of this thread and make it a sticky for a few weeks so everyone will have a chance to notice it upon their next visit here.

[jonboy99]

Thanks for the post! However I can't understand WHY the setting is different for the two bikes - I thought the frame and swingarm were the same. Wouldn't this mean the geometry is the same too, and if so why should the chain slack be different? I would have though if anything the street would have more suspension travel than the daytona, if that makes a difference.


EDIT: quick question. When checking the slack should either the bike be in neutral or the wheel free to rotate (ie on a trackstand etc)?
I ask because if the bike is in gear and the wheel on the floor, some of the slack in the chain can get taken up in the top chain run, whereas if the wheel is free to rotate then the top run will always be allowed to become tight when the bottom run is moved up and down. Hope this makes some sense!

[Knarkles]

Originally Posted by jonboy99

Thanks for the post! However I can't understand WHY the setting is different for the two bikes - I thought the frame and swingarm were the same. Wouldn't this mean the geometry is the same too, and if so why should the chain slack be different? I would have though if anything the street would have more suspension travel than the daytona, if that makes a difference.

Their geometry isn't the same! At least the shock is different (longer on the Daytona), and I think the swing arm attachment point is also a bit different. From Triumph's web site:

Daytona 675:
Rake/Trail 23.9º/89.1mm

Street Triple:
Rake/Trail 24.3º/95.3mm