125c/x project

[Davey Crocket]

But thats where your wrong Nathan, the TM came out but up against the mighty YZ125C was hopelessly outclassed, so the "M" appeared....still no contest so the "S" appeared and the hop up kit for the "M" to keep those buyers semi happy. With the "S" and the "C" it was on,. I'd disagree about the MX125C not being competative aswell.

[vandy010]

i've got a MX125c frame here Davey so gimme a few years and i'll be able to answer that question as to how it stacks up against the others.
i think i'll whack the "X" forks onto it just for that bit of spiff...
{spiff = poor mans bling...}
 

[Nathan S]

But thats where your wrong Nathan, the TM came out but up against the mighty YZ125C was hopelessly outclassed, so the "M" appeared....still no contest so the "S" appeared and the hop up kit for the "M" to keep those buyers semi happy. With the "S" and the "C" it was on,. I'd disagree about the MX125C not being competative aswell.

Having ridden a decent (not awesome) MX125C and a number of ordinary YZ125Cs, I reckon the YZ-C is a HEAP better race bike.
The TM wasn't a serious threat against the CR & KX in 1974, so when Suzuki and Yamaha got serious in 1975+, the little TM had no hope (not sure if you were agreeing with me there?).

Rossco... So it goes like this: Mother-in-law's ancient next door neighbour poured engine oil into the PS reservoir of his expensive 20-yo Merc and it became my problem. Figured that a few minutes with google to work out the correct volume & type of PS oil would be a quick and easy thing, and would be a useful start to answering the question "how much do we need to panic?".
Let me say that I was clearly reminded of the value of forums whre people actually know WTF they're talking about, and not just regurgitating the guff they've heard from the service manager at the local dealership...
And also reminded of the value of good blokes like Tony T.

[TM BILL]

Nathan you slip one of Geoffreys YZ 125A chambers (slightly modified to fit ) onto the MX 125C and it will kick all their arses 
Although the YZ C & X had it over the RM 125M in the motor stakes (6 speeds over 5 ) in real world racing that monoshock was seriously flawed and overheated in long races.

You cant possibly compare the YZ 125D with the RM 125B  the later is a championship winning motorcycle the world over while the former is a postie bike 

[Nathan S]

Get a ride on DG26's 125D before you dismiss them. Its not 100% stock, but its sure not an engineering masterpiece either.

Its the year of our lord 2010 - problems with crappy shock oil, and odd spring rates vs monoshock gas pressures from 1977 aren't particularly relevant now... Particularly as a five lap race is now considered a marathon.

[Davey Crocket]

You know he has to have the last say Bill.

[oldfart]

Bit like you DC   Boom Boom 

[Davey Crocket]

I didnt know my toilet was blocked up......who called the plumber?

[TM BILL]

You know he has to have the last say Bill.

Nathan i thought we were discussing the merits of the models back in the day ( but i suppose you couldnt get one of geoffreys pipes back in the day  ) but with Dg26 s bike probably wouldn't make any difference to a wobbler like me Nathan.

Seeing as when i was racing juniors there wasn't a delorian handy to nip into the future to pick up some 2010 technology i still maintain that production monoshock was very flawed.

Even in 70s tropical southern English summers dads were packing ice around those shocks between races, while the Suzuki dads were knocking up another trophy case between races  

ZYGOTE THIS IS THE LAST WORD  

[Davey Crocket]

Gally told me the team mechanic's use to take the monoshock off between races and put them in creek/dam/whatever water supply was available.......he said most of the time they only lasted between 10 and 15 minutes before they went off.....Gunter won those years . The other thing with the C'S and X's is they are heavy farkers....probably 10kg's heavier than a Suzuki.....the Yamaha is more reliable...bit like a Ferrari v John Deere, you no the John Deere will get you there.....eventually

[Nathan S]

Bill, I was responding to your comment "You cant possibly compare the YZ 125D with the RM 125B" - maybe not in 1977, but you can in 2010.
Donny's bike has YZ250D forks and a longer shock - it gobbles up the rough stuff like a stocker can't and the motor's power curve is a lot fuller than the RM's (although I'm sure it lacks the peak HP figure of the RM). The more of a wobbler you are, the more it helps.
And your trolling skillz need work - MX-C vs YZ-X is arguing that more weight, less power, crapper suspension and a(n even) more flexy swing arm is better?

Davey, you're on drugs - unless the RM is made out of helium? The YZ-D is considerably heavier, for sure - but the C/X is a damn light bike. Seeing as none of us are the 60kg jockeys that the bikes were designed for, a few kilos here or there is pretty much just pissing in the wind if the rest of it works well.

[Davey Crocket]

Pick up a monshock and a C/X swingarm......they weigh a farken ton.....  frames and swingarms RM=chrome moly.......YZ=heavy steel....YZX forks weigh about the same as a Quantas A380 airbus...and work about as good

[Davey Crocket]

Hey Rossvickicampbell...that YZ360B motors up to $1150, 5 different bidders and 4 hours to go...sounds like the Blues Brothers.

[JohnnyO]

Bill, I was responding to your comment "You cant possibly compare the YZ 125D with the RM 125B" - maybe not in 1977, but you can in 2010.
Donny's bike has YZ250D forks and a longer shock - it gobbles up the rough stuff like a stocker can't and the motor's power curve is a lot fuller than the RM's (although I'm sure it lacks the peak HP figure of the RM). The more of a wobbler you are, the more it helps.
And your trolling skillz need work - MX-C vs YZ-X is arguing that more weight, less power, crapper suspension and a(n even) more flexy swing arm is better?

Davey, you're on drugs - unless the RM is made out of helium? The YZ-D is considerably heavier, for sure - but the C/X is a damn light bike. Seeing as none of us are the 60kg jockeys that the bikes were designed for, a few kilos here or there is pretty much just pissing in the wind if the rest of it works well.

Do the same sort of mods to an RM125B and it'll piss all over the YZD. I was racing an RM125B in '77 and they were the dominant bike and there's a shite load of mods we did back in the day to the engine and suspension that make them a lot better than a stocker.

[mainline]

This is where we're at. Waiting on delivery of a couple of small parts and for me to sort the exhaust and then it's ready for CD8.