Have you seen a Mother Flippin?

[Number One]

Having watched the vid again with expert Sully60 on hand to point stuff out I now understand that when the back end chatters that is the warning to tell me to stand the bike up NOW!!!

Trudes he wonders about whether Rangis rear suspension is behaving itself as it should - he recalls having the same chatter thingame happen to him too.

Anywho - panadol and ibuprofen mixes rock! I feel heaps better since I took that wee concoction this morning

[Trudes]

Tell Sully60 thanks
I wondered the same after seeing that skipping in the vid, hopefully Sketchy will have a squiz at it for me.

[F5 Dave]

Yeah it just looked like it stepped out as if out of travel. That isn't entirely unexpected, the suspension is under load there & although the bike doesn't look like it is compressing it could well be that it is sitting on the bump rubber most of the time leaving the tyre to do most of the work.

My RG50 I had the same problem & had to stifften up the spring. Light bikes you can't always tell that they are bottoming & young Glenn may be too light to notice it as well. My bike used to skip along but the slicks saved me quite a few times. Wasn't till I got to a track that had a bump that I noticed that it gave me a kick in the rear.

That was a different shock than Mike used, but he is a skinny arse anyway.

Think we could do some static & race sag measurements. I might have a stiffer spring & or I can measure them. What was the shock you ended up using?

[Trudes]

Yeah it just looked like it stepped out as if out of travel. That isn't entirely unexpected, the suspension is under load there & although the bike doesn't look like it is compressing it could well be that it is sitting on the bump rubber most of the time leaving the tyre to do most of the work.

My RG50 I had the same problem & had to stifften up the spring. Light bikes you can't always tell that they are bottoming & young Glenn may be too light to notice it as well. My bike used to skip along but the slicks saved me quite a few times. Wasn't till I got to a track that had a bump that I noticed that it gave me a kick in the rear.

That was a different shock than Mike used, but he is a skinny arse anyway.

Think we could do some static & race sag measurements. I might have a stiffer spring & or I can measure them. What was the shock you ended up using?

It's not THE shock Mike had in it, but I believe it is the same as he had, an RS125 if remember right. As far as I know it hasn't had any adjustments done to it since it was put in the bike. So could it just need some preload adjusting for little Rangi and my fat arse?

[F5 Dave]

Yeah I remember that the bike had no shock in it, I brought it back for Auckers

So what shock does it have now?? Off some ex skunk project or something?

Preload won't help if the spring rate is too low. It would need a stiffer spring. - If that is indeed the case. But I'd be fairly confident.

[Kendog]

So what shock does it have now?? Off some ex skunk project or something?

It came from Steve Bagshaw, from one of their race bikes.

[Sketchy_Racer]

I think there may be a slight over complication of the subject, Number1 was carrying a substantial amount of lean angle at the point where traction was lost, it may have just been a case of cracking the throttle open a bit hard. Unless the rider can tell you exactly what happened, it really is anyones guess, as you just don't get enough detail from a video.
If you were to ask me the biggest factor here would be the tyres. They have seen a lot of heat cycles and a lot of miles now. As far as I know they are the ones that came with the frame? Correct me if I am wrong Trudes.

Cheers,

-Glen

[Trudes]

I think there may be a slight over complication of the subject, Number1 was carrying a substantial amount of lean angle at the point where traction was lost, it may have just been a case of cracking the throttle open a bit hard. Unless the rider can tell you exactly what happened, it really is anyones guess, as you just don't get enough detail from a video.
If you were to ask me the biggest factor here would be the tyres. They have seen a lot of heat cycles and a lot of miles now. As far as I know they are the ones that came with the frame? Correct me if I am wrong Trudes.

Cheers,

-Glen

Yep tyres are the same ones Mike was running, although I'm pretty sure he told me they were fairly new, like he'd only done a couple of races on them. I've been keeping an eye on Tardme for some slicks, but it seems they're not that common in that rim size.

[saxet]

It could be due to lack of rebound control, lack of damping, allowing the rear to extend too quickly.Or even too much damping.
It will be a matter of playing with it, adjusting and seeing if it feels better.
I've had issues with that corner and still don't really like it.

[Trudes]

If it makes any difference I've always felt that it feels a little "wallowy" in some corners but we were putting that down to my dodgy forks.

[saxet]

If it makes any difference I've always felt that it feels a little "wallowy" in some corners but we were putting that down to my dodgy forks.

Hell, to go against Sketchy's advice and complicate matters even more, it could even have been the forks that let the side down.
Next time youré out on it, hassle one of the A graders to try it out.
New tyres are a good place to start though.

[Trudes]

Hell, to go against Sketchy's advice and complicate matters even more, it could even have been the forks that let the side down.
Next time youré out on it, hassle one of the A graders to try it out.
New tyres are a good place to start though.

Thanks Tex
Glen's ridden it a few times so may have some ideas, as has Koba and Kyle, however they are all featherweights and I'm not.....

[Number One]

I was on the gas for a wee while before it chattered and let go there. I specifically remember thinking WHAT THE I didn't cause that...where as earlier in the day I totally did CAUSE it

Craig also made comment (as has Sketchy) about tyres AND that I need to lean much further off and so I don't have to carry so much lean and that for that reason Koba and Sketchy with their knees doing some skilful counter balancing would cancel that stuff out a bit (oh yeah and they are teeny tiny compared with I) and the fact that they probably get the whole when it chatters try stand that bugger up!

Funny thing is I didn't feel like I was carrying any sort of lean and I definately didn't feel like the bike was pushed...though I also thought about how the track almost falls away slightly on the outside/inside (whatever side that was that I was crashing on).

Still, although I got close to having crashed in the same spot as hubby more in one day than he had in however many seasons it was, I still trail him by one oopey there of course he was quick to point out that two of those were in the wet...yes dear

BTW - I love that this thread is encouraging discussion about improving the bikes - it's cool to read and think about when you've ridden (ok and/or crashed) the bike in question

[Trudes]

That is a strange corner (I actually like it... however, I haven't crashed there... yet!!!) I used to start it a lot wider out but realised that it's not necessary on Rangi as he's so small he tucks into that corner quite happily from about mid track/even almost right on the corner, yeah otherwise I feel like the camber just tries to push you off the track.
Oh well, the bike will have some knowing eyes put over it and I'll keep an eye out of new tyres.
Hey #1, if Craig wants to come and have a look at Rangi and give me any ideas that he has then he's most welcome to.