Questions about 02-03 R1 Engine & Other Parts Swap

1258 Views 8 Replies 4 Participants Last post by Killawife, Jan 4, 2015

ChR1z

Discussion Starter · Jan 1, 2015 (Edited)

Hello All,

I have a two-bike combo build going on and I'd like to get some opinions from guys who know the 02 03s well. The frame I am using is an 01. I am swapping in the 02 03 motor as the 01 is currently apart anyway... I may rebuild that and swap in back in but that's another story.

What I am curious about is which parts are truly better parts from the 02 03 in terms of suspension... IE Swing Arm, forks, wheels, rear shock, calipers etc... which parts do I want from the 02 and which should I keep from 01. I know what I HAVE to use for the motor swap but beyond that I'm wondering how much better are the 02 parts really? I have all suspension, wheel and brake parts from the 01 just not in the pictures. I also have both OEM headers and exhuasts. yes I have those huge crazy side pipes and I thinking I'm gonna start off with the OEM 01 ! Haha. I love that huge stupid thing.

Thanks.

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James D G

· #2 · Jan 2, 2015

The 02-03 chassi is better in all regards. Just compare the two frames (visually) and you will see the beefier/stronger construction of the 02-03. Look at the rear, upper mounting for the engine and the drop down sections where the swing arm bolt goes. Being able to tell any difference between the suspension bits and braking components is nearly impossible (though yamaha suggests they are better). Forks are shorter on the 02-03. The offset for the triples is better on the 02-03 aswell.

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James D G

· #3 · Jan 2, 2015

To better answer your question, use the triples, swingarm and rear shock from the 02-03, leave all other components as they're the same anyway. I'd even say the rear brake setup is marginally better on the 98-01's.

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One-ops

· #4 · Jan 2, 2015

03 for everything

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ChR1z

Discussion Starter · #5 · Jan 3, 2015

James D G said:
The 02-03 chassi is better in all regards. Just compare the two frames (visually) and you will see the beefier/stronger construction of the 02-03. Look at the rear, upper mounting for the engine and the drop down sections where the swing arm bolt goes. Being able to tell any difference between the suspension bits and braking components is nearly impossible (though yamaha suggests they are better). Forks are shorter on the 02-03. The offset for the triples is better on the 02-03 aswell.

Thanks buckets for answering!

I wish I could use the 02 03 frame - truly but no title and its hammered pretty good. I'm going to go w/ what you suggested and eventually put on 07 08 triple and the newest forks I can get fit which I think are all the way up to 14 in that triple if I recall correctly. What is the deal with the goofy symmetry on the 02 swing arm. I thought it was bent when first saw it. :screwy:

Also, any diff in the wheels?? Your said swap triples but didn't mention forks?

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ChR1z

Discussion Starter · #6 · Jan 3, 2015

One-ops said:
03 for everything

I was thinking that route but my 03 parts are higher mileage and look more abused than the 01 so if there's no diff on some I'm going to keep the 01 parts... which isn't much at this point.

I am definitely swapping the motor over w/ all the FI goodies. The 01 is good but took it apart b/c I could see some rust on the valves and the cylinders... I should have left it alone it was fine but anyway for that reason the 02 motor is going in.

Also, which tank should I use? I have an inline fuel pump that is test for the 01 tank and I know that setup works and I also have an 02 tank with a fuel pump that is not test yet... any thoughts on that one. From a functionality stand point it makes no diff but I think I like the look of the 01 better.

Opinions?

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Killawife

· #7 · Jan 3, 2015

The front calipers are marginally better and gold is gold. Their pistons are aluminium wiuth a cermaic coating and less prone to seizing. The rear brake has a smaller dic and the caliper is mounted on top of the spindle centre instead of below it. I actually converted to this setup just recently on my -00. Mostly because I think it looks way better. Who uses the rear brake anmyways?
02-03 triple trees have less offset so should be more stable.

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ChR1z

Discussion Starter · #8 · Jan 4, 2015

I feel like a complete retard asking this but when you guys refer to the offset - When precisely does that mean? At one point I thought I understood the term but I'm not so sure. Sad, I've been riding and working on these since 1990 but I honestly couldn't describe what offset actually is.

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Killawife

· #9 · Jan 4, 2015

Its the forks position in relation to the steering yoke. The yoke is in the middle and the forks to either side, if you have 0 offset the forks are in line with the middle yoke, not very good. If you have 30 mm offset the forks are positioned 30 mm in front of the middle yoke. The more offset you have the easier it is to handle the font end but you lose stability.
For R1's it seems that 98-99 has the most offset, 02-03 the least and the other years are a good mix of the two. Bear in mind that there are other things that relate to this such as steering angle and width etc but I'm not an engineer so I can't explain it. These guys can: http://bikearama.com/theory/motorcycle-rake-trail-explained/

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