DT175 derestrict questions ..

pulse01 · L Plate Warrior Joined: 19 Jul 2007 Karma :

I have bought a brand new DT175 - maybe one of the last made - but it comes restricted. I will remove the exhaust restrictor ... but is there anything else I need to look for? Any tips on air filter / air box changes, jetting etc?

Also I just cannot seem to find a manual ... any help on this would be greatly appreciated.

Most obliged to you all.

Blau Zedong · Banned Joined: 26 Jun 2006 Karma :

DT175's are not restricted, in either twin shock or monoshock form. They make about 17bhp.
____________________
18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

Finglonga · World Chat Champion Joined: 27 Jul 2004 Karma :

pulse01 · L Plate Warrior Joined: 19 Jul 2007 Karma :

Err ... sorry, but the DT175 are restricted. For a start, they have a restrictor in the exhaust.

I am located in Australia ... where the DT175 has been available from Yamaha until this year.

I have bought what may be the last one!!

Blau Zedong · Banned Joined: 26 Jun 2006 Karma :

LOL we got our last DT175's in 1984 I think, and they were 17bhp, so you may be asking in the wrong place.
____________________
18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

derbi x-treme · Nova Slayer Joined: 25 Dec 2006 Karma :

you should have upjetted the carb when you removed the exhaust restriction, if you havnt already do it now because it will damage your engine if you dont as the bike will be running lean and will overheat and score the piston and cylinder, maybe even sieze it, you could also add an open airfilter that goes directly onto the carb, so you would disconnect the airbox. you will need to upjet for this aswell.

there may also be a restriction of the cdi but im afraid i dont knw much about this, it would be best to get in touch iwth ur dealer

Blau Zedong · Banned Joined: 26 Jun 2006 Karma :

Pod filters are crap on reed valve strokers for reasons I'm sick of mentioning. The stock airbox is more than adequate and any fannying around with it will result in flat spots appearing to spoil the power delivery.
____________________
18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

derbi x-treme · Nova Slayer Joined: 25 Dec 2006 Karma :

ive gotta agree with you on open airfilters, i think overall airboxes are better.
but open airfilters will give better throttle response and slightly better acceleration, then again they make the bike run like sht if the weather is at all cold or wet. i use an airfilter for summer and change back to airbox for winter.

jpittock · L Plate Warrior Joined: 28 Aug 2007 Karma :

DeeTee · Derestricted Danger Joined: 25 Dec 2009 Karma :

P. · Red Rocket Joined: 14 Feb 2008 Karma :

https://www.mediamolecule.com/blog/wp-content/uploads/2009/06/back2future.jpg

DeeTee · Derestricted Danger Joined: 25 Dec 2009 Karma :

P. · Red Rocket Joined: 14 Feb 2008 Karma :

this is a 2 year old thread lol!

Im not old at all...

DeeTee · Derestricted Danger Joined: 25 Dec 2009 Karma :

BobbyW · L Plate Warrior Joined: 20 Apr 2013 Karma :

I replaced the stock "black"oil line that runs from the pump to the carb. The new one is clear and I noticed that the line doesn't stay full there's air gaps in it. I let the bike idle and held the pump open and it filled the line. I rode it and when I got back it had more air in it. Does anyone know if this is normal? It seems to be oiling ok because it's smoking.