DT125R FORUM

@glynn123

I wonder why I heat up so much ... in any case I repeat for the 8493020'39494598292 time since here you probably can't understand that I KNOW VERY WELL THAT A CARBURETTOR DOES NOT SOLVE MY PROBLEM but I know and help I can give to bike more than everything I'm doing, so let's open these eyes and read more, thanks

@calum
Mhm

@calum
the problem is that it does not even do 100 km / h reaches a maximum of 85-90

@glynn123
no I understood that the problem is not the carburetor but I repeat it is one thing that helps the motorcycle to do some numbers for sure, mine has been blocked at the level of the control unit in fact as I repeat I will command the zeltronic

@calum
go easy I'm not saying you don't know anything about it but here it works differently, especially because I live in Switzerland and here. engine blocks of the dt are different from all the rest of the world such as the 4BL there has never been here etc. etc. my engine block is 3ME and since you have worked a lot on this type of bike you will also know this and you will also know that they are blocked , for sure the carburettor is not the problem but it can help a lot

@calum

look maybe because here we have a different mechanics thought but put a 38mm on a 170cc athena which also has some design problems I don't see a problem in doing so, I repeat my dtr with the 170cc athena, carb of the 30mm, firebox + fmf and not it is not even 100 km / h. I prepared the cylinder together with a friend of mine who knows enough and we also prepared the engine block along with everything a zeltronic control unit, reed valve v-force 4 will also be added. I think a 32mm with all these things is underdeveloped for the components it will mount

@calum
mhm I'm not particularly sure if a 38mm is too excessive, but as soon as I mount it I'll try it and I'll let you know

@glynn123
I have a 170cc Athena that does not even do 100 km / h in addition to the fact that now we have elaborated the cylinder by opening the 38mm ports more I think it is a must

@arild okay go easy, let me know

@arild
anyway yes, I have already tried to heat the manifold to let the 38mm in but it just doesn't want to go in ...

I had never heard of the story of the cr125 which has the same bolt pattern as the manifold

however yes I have a friend who has the 3d printer but he too is not very good at making projects so we had already discarded the idea at the start I tell you if you really want and above all time to create a serious project that works I will also be happy to pay you because I'm really looking for manifold for a lifetime to fit 38mm

@calum
But in what sense? I don't understand with what you widened this hole, if I don't ask too much can you explain to me what tools you used and above all the procedure?

@calum really??? So the only thing to do is take the original manifold and enlarge it?

.

With what did you dig the manifold?

good evening,

sorry if maybe it has nothing to do with it but I wanted to ask if anyone knows how and where to find an inlet for the dtr 1991 125 38mm...

@Darty said in YAMAHA DT 125 E SWISS:

Reed switch?

?

@Darty che interruttore?

@SpookDog you rev ​​up without problems, before I turned the YPVS by 180 ° it reached a maximum of 8 thousand rpm, but anyway this is the problem here someone has to tell me if they know any mechanical block so inside or outside the engine and electronically

@SpookDog my bike has always been blocked both with the original cylinder and with the 170cc it has always done less than 80 km / h. the 170cc arrived new from a german site with everything you need i still have the box ...

@Calum
ahhh okay anyway stock gearing for dirt don't worry i checked and it's all clean

@Calum maybe you still have not understood the sport exhaust and it is no longer original I have mounted ujna firebox athena in addition to this on the site we wrote that inlet before 1991 there are no restrictions and then I do not know if the gearbox is original since I have never opened the engine and then I do not think that there are modified changes for the dtr

@Calum
okay let's say my valve is perfectly adjusted what should I do? change cdi? if so with which one?