TZR Engine questions

binge · Emo Kiddy Joined: 02 Jul 2004 Karma :

Right, as most of you already know, I am putting a TZR 125 engine in my pit bike. Its coming along alright now and ready to get the engine running.

I need to know what gear box oil I should put in it.
Also im a bit confused with the carb. There is a fuel inlet. Then next to that a pair of metal pipes which look identical. Ive blown down one and the air comes out of the other.

And the oil pump setup. Ive got an inlet pipe on the carb body just where it goes into the inlet manifold, and another small pipe on the inlet manifold its self.

Not sure if thats because its a TZR carb and DT inlet.

Any help would be great.

thanks

Ben

Barry_M2 · World Chat Champion Joined: 09 Sep 2004 Karma :

MarJay · But it's British! Joined: 15 Sep 2003 Karma :

On my MZ there is no two stroke oil injection in the carb, its straight into the crankcase.

On my Powervalve there is no injection into the crankcase, only the carb.

On my RGV there was injection into the crankcase and the carb...

I suggest you research how the TZR and DT work, because if you put oil into both you'll just foul up the plugs if it is wrong, and if you put oil into the carb and it doesn't need it, you'll run stupidly lean and pop your engine.

If you've got a DT carb with an oil intake, then I would guess the carb will be jetted to use that oil intake... so that should be OK. You just need to find out if the TZR has both carb and crankcase injection, or just carb. Crankcase injection was hailed as an innovation that would allow lubrication of the major engine components on a closed throttle.

One thing actually, how many oil outlets does the TZR oil pump have?
____________________
British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

ms51ves3 · Super Spammer Joined: 07 Jun 2007 Karma :

binge · Emo Kiddy Joined: 02 Jul 2004 Karma :

Thanks guys, Im at work at the moment on my mobile so will give karma later.

I had a feeling the carb tubes were for carb heating.

Ben

Barry_M2 · World Chat Champion Joined: 09 Sep 2004 Karma :

MarJay · But it's British! Joined: 15 Sep 2003 Karma :

binge · Emo Kiddy Joined: 02 Jul 2004 Karma :

the carb is a tzr one, it's meant to have oil injected into the carb. its the dt inlet that isn't standard. so surely i should block that up.

MarJay · But it's British! Joined: 15 Sep 2003 Karma :

I had another thought:

Being that the engine is not currently oriented in the same way that it was in the TZR frame, you may have lubrication issues with crankcase injection.

It might be worth blocking off the crankcase inlet and just using the carb. It will be easier and there will be less questions over lubrication that way.
____________________
British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

MarJay · But it's British! Joined: 15 Sep 2003 Karma :

ms51ves3 · Super Spammer Joined: 07 Jun 2007 Karma :

binge · Emo Kiddy Joined: 02 Jul 2004 Karma :

Okay just got in. Sorry about my stupidity earlier. I was at work, Bike was at home. And I was just thinking about the carb / engine etc.

The Oil inlet on the carb is actually just after the air filter. NOT just before the inlet manifold.

However, surely I wont have to re-jet, Because this is the Standard TZR setup. And its a standard TZR carb I am using. So its always been set up this way anyway.

I pulled the inlet out of the DT manifold, Need to tap the hole and screw a small bolt into it with a smear of silicone to seal that up.

Ben

ms51ves3 · Super Spammer Joined: 07 Jun 2007 Karma :

You still won't have to re-jet as the oil isn't being mixed in with the fuel.

Seems strange that the oil inlet goes before the carb slide Confused

Never seen that before.

I would still personally rather use the one on the inlet, as oil gets pumped dependant on revs and throttle position so oil would still be going into the engine down a hill, if the oil is getting pumped in behind the slide, in theory you'd get a lack of oil going down hills, then once you open the throttle, it would dump a load of it into the engine.