First off

[Derivative]

I was practicing for my Mod1 today and managed to knacker the CG pretty badly

The throttle on my bike has always been a bit sticky and sometimes needs a nudge. I didn't think this could be too dangerous until today as it's easy to fix quickly. Let the throttle go at 35, front brake on maybe a bit too fast. The rear wheel locked and the bike tipped left a little (wet patch?), I don't know what happened next. Think it regained traction, I went left and the bike went right. Pretty strange watching it slide down the road smashing bits off on the way. Gear is in a pretty bad state but knee armor kept me alright, scuffs on my visor as well.

The bike: Handlebars are out of alignment, I don't think the forks are bent as I managed to twist the wheel back into position with a bit of leverage. Speedo is smashed up and catches at 10mph as the clocks aren't parallel with the unit now. Both mirrors are knackered (not smashed, the joints are all buggered. Rear indicator snapped off, Front brake lever bent. Rear part of the 'fairing' is cracked as well, along with a knackered footpeg (rubber's snapped off, fair amount of the metal has ground down or snapped off somewhere)

Don't have any pictures as the bike is in a relative's garage, will be without it for a few months so I'll be checking up then :/

I'm just kinda depressed as I might end up having to just scrap the bike and hire for my practicals now. It worries me how easily this happened, not ungrateful that it happened on an empty industrial estate!

[stonesie]

Glad your ok, The bike can be fixed for not-a-lot by the sound of it, that's if you want it back on the road...

[CaNsA]

https://www.tier8.net/pictures/welcome1-126.jpg

[joncwl]

well the good thing is you ok at the least be thankful your bike took the damage and not you glad your ok btw
____________________
currently being a cager cause winter......the bike will be back out during the summer now

last bike, 1990 yamaha tzr125 (2rk model) - still after a fairing kit for it !!!!!

[blurredman]

Ah gutted mate, sorry to hear that


That's damn annoying fella.


I heard offroad motorbikes are easier to balance at lower speed because the natural high revving of the engine acts like a gyro better than a lower revving cg.

If that is the case, would it be a good idea to have the rev on the CG higher when doing things like low speed ?
____________________
CBT: 12/06/10, Theory: 22/09/10, Module 1: 09/11/10, Module 2: 19/01/11
Past: 1991 Honda CG125BR-J, 1992 (1980) Honda XL125S, 1996 Kawasaki GPZ500S, 1979 MZ TS150.
Current: 1973 MZ ES250/2 - 18k, 1979 Suzuki TS185ER - 10k, 1981 Honda CX500B - 91k, 1987 MZ ETZ250 - 40k, 1989 MZ ETZ251 - 52k.

[joncwl]

yeah offroad bikes are alot easier to balance i think my rm80 did roughly somthing between 15-20k revs revs my step dad said and he used to do alot of motocross racing in his youth and his dad did so they know a fait bit between them
____________________
currently being a cager cause winter......the bike will be back out during the summer now

last bike, 1990 yamaha tzr125 (2rk model) - still after a fairing kit for it !!!!!

[c_dug]

Surely the high centre of gravity of an MX bike counters any gyroscopic effect the engine has?
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[blurredman]

[N cee thirty]

the cg is easy to balance,sometimes i can go up to cars at lights and stay straight at any speed,for a few seconds i can stay up stationary
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[c_dug]

I don't think that can be attributed to this:

[blurredman]

[quote="c_dug"]I don't think that can be attributed to this:

[Bull]

[quote="Blurredman"]

[tahrey]

Bad luck fella

However if you haven't ruined the frame I bet you can patch it up cheaper than you think with ebay and/or scrappie parts. What, bars, mirrors, pegs and plastics? All bolt-ons.

As for the gyro thing, this was actually a tip that one of the guys on my DAS said about. I don't know whether it's real, or some kind of placebo thing (and the real trick to it is that it means you can smoothly feed the power in with the clutch, rather than having a lumpen surge with it fully engaged), but it definitely did wonders for my stability on the figure-8, U-turn, tight corners and all that stuff. Probably more effective on a slightly larger engine - maybe a 125 but certainly the 500s we were using.

'course, it's no good on a boxer or the like!

[Clanger]

Don't beat yourself up about it. In hindsight you will see it's better that you do all your falling off, and silly accidents on a cheaper slower ride. It's all part of the learning process.

Once you become more proficient and capable, you won't make so many daft mistakes and you will become more confident...and with confidence comes the bigger and more powerful and more expensive bikes...

By this stage you won't want to come off because of the expense of the damage it will cause...hopefully it won't come to this, because you will be a better rider.
____________________
Be who you are and say what you feel, because those who mind don't matter, and those who matter won't mind - Dr. Seuss