Derbi GPR Smoke

Jaws · L Plate Warrior Joined: 29 Sep 2006 Karma :

Ok,

Just bought my GPR and i know very little about 2-stroke engines or 50cc bikes.

I rode to work this morn at 9am and parked bike outside and then it rained.

2pm i drove home and it has stayed there until 10pm tonight when i took for a drive around the city. I got back from my drive and i could smell a little burning and there was a slight bit of smoke coming from the exhaust (very slight) so i gave it a little more and there was a bit more, bearing in mind that it is a cold evening.
btw. im using fully synthetic oil.

Is this normal for a 2 stroke?
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Derbi GPR Replica 2004 - Restricted!

beatnck · Could Be A Chat Bot Joined: 29 May 2006 Karma :

yep, you will get a bit of smoke from a 2stroke, along with the 'distinctive' smell! my rs smokes the whole road out if its a cold morning Laughing

Jaws · L Plate Warrior Joined: 29 Sep 2006 Karma :

lol gdgd its the second time its done it thats all its done 1000km so i guess that aint bad. Anyway im putting in for service on fri so im sure if theres anything drastically wrong then they will sort it out under warranty Very Happy

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Derbi GPR Replica 2004 - Restricted!

Jebus · Brolly Dolly Joined: 10 Jul 2004 Karma :

the smell of 2 stroke is wonderfull and you will get the smell all the time, smoke is usual on a 2 stroke even when bike at full working temp you will get a little bit of smoke when you rev it, while its warming up you will get a fair amount of smoke, but its nothing 2 worry about. If its cold you will get oil condensing inside the exhaust which will be slowly burnt off. Enjoy the 2 stroke world, its great!
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2nd time around Smile

CBT: 8/9/11
125 Varadero

code guru · Brolly Dolly Joined: 25 Jan 2006 Karma :

lol u should had seen my nsr when u 1st start it up. u r sitting in a cloud of smoke.
50cc dont burn a lot of oil like the 125s but thay still do smoke a bit and yes it smells bad when u 1st get a 2t. i remember my ice 50cc scooter 2t. it smelt well bad i think it was just the exhaust because it was new. make sure u r useing fully sinth oil. its recomended for a geared bike as the rev quite high.

mrbluesbox · Scooby Slapper Joined: 14 Sep 2006 Karma :

i got the GPR 125 and mine smokes every morning for a couple of minutes untill its warmed up properly. I wouldnt worry about it.

gaz.
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extreme3d · World Chat Champion Joined: 27 Dec 2004 Karma :

It's not actually smoke Wink

Well some is, as a 2-stroke will naturally kick out some oil in the exhaust gases, but all bikes both 2 and 4 stroke kick out large amounts of water vapour until they are warmed up. So most of that smoke is nothing more than steam.

At this time of year the water (a natural byproduct of combustion) condenses as soon as it leaves the engine and touches the cold exhaust system. This produces large amounts of white vapour. Once the engine/exhaust system has warmed up the water stays as a hot gas (clear).

Cars will also be producing white vapour on cold winter mornings - a sure sign winters arrived!

irving · Traffic Copper Joined: 02 Oct 2006 Karma :

Jaws · L Plate Warrior Joined: 29 Sep 2006 Karma :

well i bought it with 28 km on the clock from a dealer and already had oil in it but not sure what it was but now im using fully synthetic comma 2 stroke oil so i guess the old oil could still be burning through.
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Derbi GPR Replica 2004 - Restricted!

irving · Traffic Copper Joined: 02 Oct 2006 Karma :

Jaws · L Plate Warrior Joined: 29 Sep 2006 Karma :

Sorry i know this is offtopic but i thought it would be better to save making another post, my bike is liquid cooled and i dont have a handbook yet (on the way) what do i put in the coolant tank? just water and antifreeze? its in for service tomoz so i guess they will top it up but ive done 1200km and its still got some in there so not too bad lol.
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Derbi GPR Replica 2004 - Restricted!

mrbluesbox · Scooby Slapper Joined: 14 Sep 2006 Karma :

Ok im guessing that its going to be the same as the 125, so you need to unbolt the petrol tank.
theres one bolt near the steering yokes and two near you crotch type area after you removed the seat. pull the tank back and be careful of the hose that takes petrol to the engine (i havnt undone that yet but im guessing you gonna get soaked in petrol Smile

)
you should see a big plastic reservoir thing (bit like you 2t oil tank) under there somehere and thats where you put ya water.
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mrbluesbox · Scooby Slapper Joined: 14 Sep 2006 Karma :

Ive also found these 50cc GPRs manuals while i was looking for the 125 one. so these should help a lot Smile

https://www.derbi-club.com/technical.php
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I seem to have misplaced my pants...................

irving · Traffic Copper Joined: 02 Oct 2006 Karma :

Jaws · L Plate Warrior Joined: 29 Sep 2006 Karma :

yeh im on an 03/04 derbi gpr replica and it has a fake tank in the front so in that i have the oil and coolant tanks. so im guessing i just poor water and antifreeze in that. Thanks!
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Derbi GPR Replica 2004 - Restricted!