DT125R ARCHIVE

dreamwoofwoof · DTR Member

just did my power value 07 bike

dtrcruzer · DTR Senior Member

hi mate have you dun anything else to your bike?also what you getting top speed?

dreamwoofwoof · DTR Member

nope nowt else 80mph top speed doing my exhaust today so will be off the clocks tomorrow,But spoking to a m8 and he did his power value and cracked his pistion because it was not flush, The dump arse,so thinking about it iv put it back on the ypvs but changed where it sits from normal etc will give info once i see a change in the way the bike run, At the moment it still lefts in second and pulls nice in low revs if bike blows up etc or any other mad changes will post in here.

dtrcruzer · DTR Senior Member

iv got the same bike 07 plate aswell i left my power valve alone mate all iv dun is the earth wire and got a full dep system and iv been clocked at 90 so far didnt wanna push it any more every over 125 iv race thort it was a 250 lol

dreamwoofwoof · DTR Member

just order my dep exhaust for the shop today so hope it goes off the clocks and stays off the clocks,Anyways been specking to a garge and they said there is not way you can crack the piston if i have the value open all then time so once exhaust here going to try with ypvs on but with the value open at the start of the bike and then without it with value open will info once dep is here.

SimsonS51E · Guru

Woof ..

PV & Piston Can & Will Meet if your not careful ...
But general wisdom tends to be on re-bored barrels....

Yours [RE or X 2004 to 2007] is set up from Yam for the absolute best running to overcome the HUGE Cat' in the Xpanny ...

Standard PV position WITH servo attached is king ..

Gives best possible bottom end [for a pi$$ing little 2T !] and opens up fully to rev out nice ...

See de-restrict info on this site for 04 / 07 ..

http://dtr125.net/tuningf.htm

Yours just needs ...

Wire grounding out to stop PV 'fluttering' at high revs .. [This is the main restriction]

The CAT cutting out from the Xpanny .... [Very Restrictive] .... or a DEP Xpanny

That's it ...

85 to 90 mph Eeeeeasy !!

Don't bother chopping the reed block guides or blanking off your N/S bottle whatsit ... neither appear to restrict ...

We get 10 new users a month thinking they are able to setup PV's better than Yamaha ...

& five of em tend to have shagged motors in 3 months !!

Get the Yammy Workshop manual ... Put the PV back as should be & de-restrict it proper m8 ... !

If you aint got a yammy w/s manual .. just say ...
we might have a cure for that

................................................................................................................................

PV's are to give ****e 2T motors more bottom end, then let em rev properly at the top end .... by disconecting your PV servo, you have just made the bottom end $hite & given your motor the torque characteristics of a slug ! {not planning on any offroading are ya ??} ... If you follow the guide .. you will get the same top end 90 mph .. but keep your grunt at the bottom of the revs !!!

WIN ..... WIN ..... !

-- Edited by SimsonS51E on Sunday 17th of May 2009 09:06:17 PM

-- Edited by SimsonS51E on Sunday 17th of May 2009 09:09:51 PM

dreamwoofwoof · DTR Member

ypvs is now all back on and together nice bottom end revs.
With ypvs off no revs at bottom end was dipping the cluth none stop to get the band in but i did get 83mph ish with ypvs off and i get 80mph with it working but the bottom end revs wicth i need as i found out the other day when i was going to work in the rain and could not get the band to kick in going up the muddy fooking hill.,

So to sum up iv got my full dep exhauts on now does 80mph going in to the wind with nps.Iv got very nice bottom end revs with the ypvs working and nice top end speed,but i have moved the value to where i like it its not full open ort closed its about 7mm off the top of the port with the bike started so it will rev tro to the band quicker.Sorry about my spelling and grammer etc im ****ing **** at words/spelling etc

Anyways i like what iv got/done to my bike so fare im getting a 14-15 front sprocket next

And im not cutting the air in take as i use the bike for off road use and dont want water in the carb.I will be getting reeds if i find a good pair and maybe looking at the jets or im buying a wr450 or 250(last part of my test soon)

My bike does 80mph because sorting the exhaust out has a hole in it missing bolt etc got one fixed but now the other has f-ucked.

-- Edited by dreamwoofwoof on Saturday 23rd of May 2009 08:32:22 PM