offset front sprocket group purchase

[andyaber]

Hi

If you've read DixonJ's thread about yzf/thunderace swing arm conversion, you'll know what this is about.

If not it will be quicker for you to find and read it than for me to learn how to post links.

Would anyone else with a yzf or t'ace conversion be interested in one of these to line up your chain properly?

Gauging interest in group purchase for possibly better price. They are not cheap but I'll leave more accurate pricing to John or Paul depending on numbers.

Cheers, Andy.

[Trixed]

I m sure there ll be a few in Aus interested. There's a few here with yzf swingarms.
Please up my name down. Someone may have to mail down here though. A group purchase from Australia would bring the mailing cost per unit down.
Thanks

[andyaber]

Hi

I just want to add that DixonJ and Tzx660 have done all the leg work on this and spent time and money getting one offs made and testing them.

How things progress from here should be up to them, but i'm happy to do my bit.

Cheers, Andy.

[drix]

Count me in for one or two of those sprockets

[Con Rod]

I strongly suggest that you at least correctly measure your wheel alignment before changing your front sprocket

http://www.pegmonkey.com/node/1057

http://www.framestraightsystem.com/Moto ... 0Check.htm

you can then measure your chain alignment and decide the how much off set you need

[alextrx850]

Some will need to be sure of the pitch of your chains as well, eg 520,525 ect

[andyaber]

Hi Con Rod

Have been assured by others that their wheels are in alignment.

Having read your thread on the matter though, I'll see if I can check mine at all accurately today.

Perhaps, before anyone commits themselves, people would check their wheel alignment by the method in Rod's post above and report back any findings. This may give us a consensus of opinion.

Remember to check rear wheel alignment in the swing arm before alignment with the front wheel.

Another factor for consideration is cost. I hope John or Paul don't mind me saying that cost of the sprocket is in the region of £70 before the cost of modification and postage.

Please if you're interested, check your wheel alignment and post back.

Cheers, Andy.

[andyaber]

Had a first go at measuring alignment today.

Measured from centre of swing arm pivot to centre of rear wheel spindle both sides.
Took rh peg and brake off to allow better line of measurement, but relying on tailor's tape measure and my old eyes. Within a mm so wheel pretty square in swing arm and points roughly front to back.

No rigid straight edge long enough available so tried the string method to check alignment with front wheel ie both wheels central to bike.

Relying this time on two sets of old eyes, made some chalk marks on floor at front wheel when string seemed to be a straight line, touching rear tyre twice. also marked width of front tyre.

These marks were just about 180 and 120mm apart respectively and were pretty central with about 30mm difference each side making things look roughly central.

Now here's the massive qualifier -
My first go at this
Plenty of scope for errors (was bike vertical, was line straight etc)
Was the system accurate enough(tailor's tape, width of chalk etc)

Because of these points, I'm not putting this forward as valid proof or support of anything, just a report of my first go.

Anyone else had a go?

Is there a jig available at all to check this?

Con Rod, what method did you use?

DixonJ, Tzx660 any light to shed?

Will have another go in next day or so and report back.

Cheers, Andy.

[dixonj]

Yep, we have also done our measurements using an engineering straight edge Paul's was 32mm either side mine was 30mm either side (just different tyres used). When I return home I will post all the photos. Sprocket charge was £65.00 posted not cheap, but I have just purchased a new genuine chain guide at the cost of £75.00 so £64.00 is not that bad for a billet steel case hardened sprocket we also paid a local engeering company £20.00 each to have them machined down and now very happy with our results.

John

[dixonj]

Yesterday Paul and my self re checked and checked again our wheel alignment, this is how we done the checks bike on rear paddock stand, chain off loosened back wheel off slightly moved the wheel as far back as it would go used a engineering straight edge measured the gap at the rear of the front wheel and then the front of the front wheel we got 33mm both sides
measured both sides of the front of the rear wheel we got 25mm so all square with our 6mm offset sprocket everything lines up perfectly. no need to hack any bits off your swingarm .













I sincerely hope this puts an end to all the doubting Thomas's.