DT125R FORUM

Hi guys. I got the same issue as andrewj1680 had in his topic "Need Help". So I cant start the bike when it is cold. It starts easy with the choke on. The head gasket is new. Ignition coil is new as well. The carb was cleaned 2 times already. Looks like need to have a look into carb again?

https://www.youtube.com/watch?v=oW1T_5G3KIA

@nottsbiker

@nottsbiker The was different spacing between them. I have pushed them gently to original positions. According to DT125R manual it says that the space should be 6.8 mm,
Do you think it is the same for Belgardas? The engine is the same, but the carb is different.

@tdrnoob Due to not finding the problem I started to check the back wheel. I felt that it it could be something with the brakes/wheel.
And it was the rear master cylinder fitted in wrong position to the frame. It was fitted on the frame and supposed to be behind the frame... That what caused the brakes to drag.
Such a simple thing. And such a noob.
But so glad that I found this issue and is fixed now.
You know that feeling when after long disappointment you feel full wave of happiness.

Confused about the reed valve. Took it out last time and I don't remember which way to put in. On a manual it says that there is special cutout on the corner but I don't see anything on mine. There is white marking on the top in the center. Is it correct like I am holding in a hand or upside down? The upper gap seems wider than down one.

@zrako Where did you buy that part for starter clutch?

Some pictures of my carb with a float.

Any advice about the level.

@tdrnoob Found a small crack on that rubber, but it looked not too deep.

I have put some glue.

Last picture is to compare my one on right and the other one left from DT 125 (had a spare one). It looks like someday my one was modified.

Spark plug news

According manual it looks like it is carbon fouling colour

Causes

rich fuel/air mixture (maybe air leek)
faulty choke (Not sure how to check as it looks all right)
blocked air filter (probably not)

Pictures

@irongamer727 Do you mean the whistle?

Looks like it is the problem with the starter, but I think it does not affect the main issue

@nottsbiker I will check that.

Thank you

@nottsbiker I didnt change anything in carb. Dissembled and cleaned with the carb cleaner. Then put it back together as it was before

@darty said in TDR issue:

I mixed petrol as per instructions. Used about 35 ml of 2 stroke oil with 1 litre petrol.

No idea what to do with jetting.

I didn't expect that after full engine rebuild

Another update with the brand new issue

Cold bike. I couldn't start start it. It didn't accept the throttle. Started with the choke only. When warmed up everything worked fine with the choke off.

Spent about 10 minutes on adjusting the carburetor air screw (to get the highest rev on idle)

Noticed that the bike is heating up a bit to fast. (Heat arrow pointed at 3/4)

Decided to go for a ride

In the beginning accelerated well, after 2-3 minutes started to feel like something is dragging behind.

Engine was running very slowly and it didn't accept the throttle.

I stopped and noticed that in neutral gear is hard to push bike forward of backwards. Looks like the engine is tight?

When it gets colder then gets back to normal.

Video

https://www.youtube.com/watch?v=KV5ynUc5-xw&feature=youtu.be

Any thoughts?

Regards

@nottsbiker That is sexy

@nottsbiker Yes I did.

I was following them and waiting for something special like this.

On which french website you are searching for those Belgardas?

@nottsbiker Not sure if it is tight as it is my first bike

Also I have changed the old air filter and cleaned the carb properly.

Good progress because of wanting to ride and commute to work.

I bought it back in may and since then made only 100 miles.

@zrako Thank you

@zrako Yes, it looks like is the same thing with mine.

Have you fixed that or just ignored?

@oldman I have changed the old seat cover with the new blue leather. It is not perfect fitted as I couldn't stretch properly where is angle.

Pretty happy with this blue color