Chain and Sprockets for the 1100 (630 to 530 Conversion)

[Uncle Bob]

Time to change these I think. On other bikes, I have always tended to use DID Gold X Ring Chain with JT sprockets.

I was tempted to go for JT chain as well this time (so long as the DID chain breaker I have works else I will stick with DID).

I see the 1100 uses 630 chain (on the JT site http://www.jtsprockets.com/catalogue/model/1836 the application says 630 chain but the link to the chains doesn't show any 630, just up to 530! Also that site shows it possibly might need an extra washer / spacer thing.

What are other views on C&S to use on the 1100?

Rob

[johnr]

fit the 530, they fitted 630s back in the day cos chain technology wasnt too hot, but a 530 is enough to lay the 180+bhp down from a hyabusa so will be plenty good enough for the kat, as well as being a bit cheaper and not sapping too much bhp. i had 530 on my last kat build.

[Uncle Bob]

Thanks for that John, 530 sounds good - do you remember what sprocket sizes you ran (I have stock wheels and tyre)? Having a Google I think the front needs to be 17 teeth to get the same diameter so I think a 48 tooth rear is required to keep the 2.8 ratio. Any spacers or the like required?

in saying that its never actually moved under its own steam yet

Blix do you know the JT sproket part numbers you used and if any spacers needed at the front?

Oh and then how many links for the 530 chain. Again having a quick look 114 pops up - sounds right?

[Uncle Bob]

Thanks for that Blix - I have checked out those sprockets on the JT website. I take it the 2 holes in the sprocket (as opposed to the 1 in the 630 version for the Katana which are at different distances from the centre) aren't used.

I did find http://www.suzukiperformancespares.co.u ... -set/2246/ doing a kit with Regina chain (which i haven't looked to see how that performs yet) and not named sprockets. I just need the amount of links in the chain now.

I'll have to make some calls tomorrow to see what JT say, if anything...

Rob

[sparki]

45 rear is a nice size....

[Uncle Bob]

Thanks for the offer, but I was going to try and keep the same ratio of 2.8 which would mean a 17/48. I did read a comment on ACS from FBJ about using a 45 rather than 48 due to revving but that might have been on a modified bike. If I have issues I'll bare it in mind though.

I read also for working out links then times the 630 links by 1.2 to get the 530 links required which is 115 (which might tie in with your 114 links being a bit tight), but that didn't state sproket sizes. Talking to the man at JT he said buy 120 links and cut down as required, then I'll know for future.

[Pedda]

Just help me out, please - isn't the 630 pitch front sprocket 15 teeth from factory?
If you convert to 530 you better take a 18 T then, because that's about the same diameter. Best option for rear is 50 T in combination with that one, if you want to save the ratio approximately. Any smaller diameters will make the chain tend to find it's way onto the swingarm surface.

[Pedda]

Worth a thought: convert to 520 pitch which is still safe performancewise. I use a 520 on my 1230 cc Kat, 136 hp or something with 110 Nm torque.
You will save some rotating wheight by this. And in case you go for a wider running gear and need to gain some mm of chain clearance to the frame it's the way to go as 630 and 530 are just the same width.

[Uncle Bob]

Hey Pedda - Thanks for the input - I was away at the weekend so was just reading it. I had seen that 18/50 was probably closer from http://www.suzuki-katana.com/katana_gearing.html (see Gearing section) and the cutting into swingarm is something I didn't want!

I need to get in the garage and check distances.

My bike is all stock. Interestingly that site also mentions that the stock tyre of 4.5v17 is around 114/88 so using the 130/90 17 tyre means you have gained a little speed over acceleration.

I'm probably over thinking this (I'm good at that) but:

From http://www.rbracing-rsr.com/calcsprocketdiam.html chain dimensions are (inches):

Code: Select all

Chain     Pitch     Roller Dia.  Roller Width  Sprocket Thickness
530       0.625     0.4			 0.375		   0.343
630       0.75      0.46875		0.375		   0.343

So diameters are (metric):

Code: Select all

630	dia. mm             dia. mm
15t	91.62542		42t	254.91694
						
530	dia. mm             dia. mm	
17t	86.39556		48t	242.72494
18t	91.41968		49t	247.77446
                    50t	252.82398

shows your 18/50 is near enough. However that ratio drops to 2.778 (from 2.8 stock) and using http://www.gearingcommander.com/ you can see that is again gives an increase in speed over acceleration. Stock with original tyre was at 212kph @ 8500rpm, using a 130/90 tyre takes this to 223kph @ 8500rpm whereas the 130/90 tyre and 18/50 530 chain gives 225kph @ 8500rpm.

Sooo... I'm tempted to go 17/49 with the 530 as this will then give a bit more acceleration back to give 217kph @ 8500rpm (with the 130/90 tyre)

I will lose about 5mm diameter on the front and 7mm diameter on the back, so need to check the clearances then but I did see http://www.suzukiperformancespares.co.u ... -set/2246/ did the converstion kit already (with Regina chain and no name sprockets) and they did use the 17/48 combination so assume that is is OK so 17/49 should be fine).

520 idea is interesting but for now I think I'll try the 530 idea as that is possibly more useful for others once all is OK with the correct chain links. The 520 uses thinner sprockets so I guess spacers would be needed as well.

Rob

[Pedda]

No spacers for the 520 needed as both sprocket and blade are thinner by the same amount.