Tag Archives: YZF R125 modified

YZF-R125 CLUTCH IMPROVEMENTS AND rear HANDBRAKE PROGRESS

I don’t even know where to start so I’ll just chuck some pics in and hopefully it will make sense along the way

And the quest for wheelies continued…

Ok so i beginning there was the normal clutch lever, then we went shorty two-fingers (which was better) and then slipping off once too often when pulling up with two fingers I realised why they all have 1-finger levers…

Love these lovely CNC’d numbers but wheelies say you gotta go

The 1 finger lever (ebay link) is actually bizarrely comfortable like I’m thinking why the hell did we have all that other nonsense before. The movement is pleasantly smooth and precise. Also the lever has 3 positions where you can hook the cable in which slightly change the feel and cable orientation to suit your hand. There’s a wee bolt to set the resting position of the lever too so you can get it set up exactly how you want. So much fun with one finger…anyway.

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Learning to wheelie & drift, practice session on YZF-R125

PLS NOTE: I (currently) suck at wheelies – this is about me getting better at it on my R125.

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Learning to wheelie on the YZF-R125

ok soooo..

I’m not sure why exactly I’m motivated to do this but I really want to learn how to wheelie and drift my bike. I’ve always been into drifting cars but somehow had never considered drifting bikes, probably because it’s kinda insane and dangerous as activities go.

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Debunking airbox mods On Yamaha YZF-R125? – part 1

Ok so this seems to be an ongoing urban myth, whether it’s chavs drilling the airbox of their mum’s Fiesta 1.1 popular or little 125s, or even big bikes, people seem set on the idea that airbox designers are actually our mums who are trying to sneakily slow our bikes down. or something.

Why am I even going down this road?

On my bike I’ve shown the exhaust side of the engine quite a lot of love and attention, but despite the nice, big-bore shiny pipesness, she continues to run better with a little baffle in the end, like so:

The best reason I can come up with that the bike runs better with a smaller diameter exit/baffle in the end (effectively restricting the flow again) is that perhaps the exhaust is a bit much pipe for the bike – and by that I mean for the amount of air the engine is moving, the pipe diameter gets too wide at the end, which ends up with the gasses slowing down too much and actually impeding scavenging of the exhaust system. Or maybe there’s some sort of sound-waves stuff going on like with two-strokes.

Either way with the baffle in you get a little bit of torque around that 70mph point where you shift into top gear. With the open pipe it didn’t have the oomph to push through that but with the baffle it does (albeit slowly).

A couple of months ago, under what turned out to be ideal conditions on a private runway, thanks to that baffle we hit 85mph.
That was on a 15t front gear too so would have needed even more torque to make it through to the power band.

And it was absolutely equal parts terrifying and exhilarating..,as you would expect flying along on a glorified moped! 😀

Continue reading Debunking airbox mods On Yamaha YZF-R125? – part 1

YZF-R125 Handlebar risers vs clutch cable

So when I did the handlebars conversion and made up the new clutch cable, I kept it following the OEM design where it has a corner just before going into the clutch lever assembly…like so:

On the left you can see the 90 degree elbow..

For whatever reason, that doesn’t really seem to work too well on the new setup. This was something I only discovered when trying to learn to pop wheelies the other day…

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fitting clip-on handlebar risers to the YZF R125

I’ve got a prior back injury which means the leaned over position of the R125 can be a bit much on longer journeys, and over christmas I’d been commuting on the bike every day and my shoulders weren’t getting a break so was constantly aching, not ideal. So I’d been wondering about the possibility of fitting some clip-on risers for a slightly more upright position.

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