Got me a new bucket !!!

[Ivan]

Hey I got me a new open class bucket racer today, I scored a GT125 sounds like its going to be good except for one thing, I found out It is 2 stroke so its going to need new exhausts is it possible to run a 2 into one exhaust on a 2 stroke as I know you can on fours its twin cylinder and from what I know its going to be allright, have to find out if its CDI or not I want it to have a narrow power band but have quick response at getting there. It will be a fast little machine dont know exactly what has been done to the motor will have to port it, I get it on Monday frpm Weltec
So all you guys in Wellington are going to have to start to me

[riffer]

Cool bike. I had a GP125 but always wanted the GT 'cause it was a twin AND had RAM-AIR. 16HP for the GT versus 15 for the GP. The GT had the reed valves rather than the rotary valves of the GP. Now that I look back, you didn't really get a lot more for the extra piston. Maybe it was the weight of those chrome exhausts...

Can't remember about the ignition but I seem to recall they had CDI. Best to check though. It was a loooooong time ago and as madboy has reminded me, my memory is crap.

Whatcha doing with the old bucket?

[Ivan]

Cool bike. I had a GP125 but always wanted the GT 'cause it was a twin AND had RAM-AIR. 16HP for the GT versus 15 for the GP. The GT had the reed valves rather than the rotary valves of the GP. Now that I look back, you didn't really get a lot more for the extra piston. Maybe it was the weight of those chrome exhausts...

Can't remember about the ignition but I seem to recall they had CDI. Best to check though. It was a loooooong time ago and as madboy has reminded me, my memory is crap.

Whatcha doing with the old bucket?

Well I'm keeping the old RG50 as that bike is still furking cool, I dont know what the other is other than my AX100 but I dont know what I'm doing with that at the moment the good all GT cost me a ford escort panel van

Im gonna be when that go's but o well a buckets a bucket you dont get in trouble by the cops for thrashing your bucket

[Skunk]

It is 2 stroke so its going to need new exhausts is it possible to run a 2 into one exhaust on a 2 stroke as I know you can on fours its twin cylinder and from what I know its going to be allright,

I'm sure the answer is no. Here's a link to how two stroke chambers work - here. If you look at the last pic you'll see that having two exhausts into one chamber would stuff up the returning pressure wave...

[Ivan]

I'm sure the answer is no. Here's a link to how two stroke chambers work - here. If you look at the last pic you'll see that having two exhausts into one chamber would stuff up the returning pressure wave...

Yeah you PM'd me that furk that sucks have to build an expansion chamber but fairly similar will run it the good ol fashioned way to start with until I build up me old Aprillia chassis

[gav]

What size carbs does it have? You do know that with an air cooled 125 you are only allowed to run the equivalent of a 24mm carb, so that means to run twin carbs, you will need to have no bigger than 2 x 12mm carbs to be legal!

[Ivan]

What size carbs does it have? You do know that with an air cooled 125 you are only allowed to run the equivalent of a 24mm carb, so that means to run twin carbs, you will need to have no bigger than 2 x 12mm carbs to be legal!

Damn have you seen how buckets has gone the rules are gone most of the buckets are basically GP bikes now noone runs legal carbs these days I'm running it how it has been tuned and its staying like it tell me how many guys run 12mm carbs only me on my RG50

[Kickaha]

Damn have you seen how buckets has gone the rules are gone most of the buckets are basically GP bikes now noone runs legal carbs these days I'm running it how it has been tuned and its staying like it tell me how many guys run 12mm carbs only me on my RG50

The rules aren't "gone" they are still in the MNZ rule book as they always have been and it's up to the clubs and competitors to enforce them, if anyone has to cheat to get anywhere then they're not much of a rider and shouldn't be allowed on the track


On your RG50 you can run any size carb you want on an air cooled twin over 100cc you are restricted on carb size, read the rule book it's all in there

[Eurodave]

If you look at the last pic you'll see that having two exhausts into one chamber would stuff up the returning pressure wave...

Yeah,wot he said, remember back in the '70s when GT380/550/750,s could run 3 into1's? sure sounded cool but dicked the power output big time

[Kickaha]

Yeah,wot he said, remember back in the '70s when GT380/550/750,s could run 3 into1's? sure sounded cool but dicked the power output big time

We had two GT550 triples with 3-1 and yes it slowed them down but we considered that awesome sound a worthwhile trade off

[Eurodave]

We had two GT550 triples with 3-1 and yes it slowed them down but we considered that awesome sound a worthwhile trade off

I rest my case!

[Ivan]

Nah I dont want to cheat but I mean, you got to think it will probably has that size on it standered its a bucket racer any ways it is at weltec tho

[k14]

What size carbs does it have? You do know that with an air cooled 125 you are only allowed to run the equivalent of a 24mm carb, so that means to run twin carbs, you will need to have no bigger than 2 x 12mm carbs to be legal!

Yes the total allowable size is 24mm but that doesn't equate to the same surface area as 2 12mm carbs. More like 2 16 or 17mm carbs, can't remember off the top of my head but its something around there, pretty easy to work out anyway.

[Ivan]

Yes the total allowable size is 24mm but that doesn't equate to the same surface area as 2 12mm carbs. More like 2 16 or 17mm carbs, can't remember off the top of my head but its something around there, pretty easy to work out anyway.

Wat the have you guys seen the bikes running down Wellington they are blimin Honda RS125 rip offs I think HRC might employ a few of those mechanics to get there RS125s running even faster

[TonyB]

You'll definitely need two pipes. The reason two strokes make so much power is that they can employ expansion chambers, which do two things- they suck the new mixture into the cylinder, and then compress it- effectively supercharging the engine.