Got my Xian Racer exhaust and other bits, couple of questions...
Hello everyone!
Just received my exhaust from xianracer as well as the Molkt carb, jets, filter and a new spark plug also.
I have a couple of questions that I thought you may be able to help me with! When looking down inside the exhaust I see a section of the baffling in the middle which flattens out. The picture explains what i mean:
http://img.photobucket.com/albums/v6...d/baffling.jpg
Here you can see that the baffle flattens a bit in the middle of the pipe to form a flatter hole. Is this normal?
And finally, how loud can I expect it to be? I can't fit the exhaust until next week, and I really like loud exhausts. What would it take to remove the baffles, if it is at all possible.
Thanks very much for the help everyone!
Exhaust from Xian racer for QM200GY
I saw that flattened out bit when I looked inside mine. I imagine it's some sort of restriction to help the silencing a bit. Being of a straight-through design they can be a bit loud at wide throttle openings. As it is the noise at town speeds and small throttle openings is not bad, rising to a pleasant loud thumper noise at higher revs.
Molkt carb for Qingqi QM125/200GY
Great. I thought at the start that there was something wrong with mine...by the way do let us know what results you get with that Molkt carb. I thought about experimenting with one, getting rid of the complex CV type carb fitted to my 200cc model.
The problem was that the rubber carb adaptor fixing screws are at a 65 mm pitch and the Molkt carb only 47 mm. Even if the pitches matched, I would have to find or make some sort of insulator and gaskets.
I notice that the 125 head is probably the same 65 mm pitch between studs but you have a sort of step-down adaptor that matches smaller carbs. This means that I could get one of those adaptors and possibly try one on mine. The only thing left would be obtaining a suitable throttle cable, as the 200 has one of those twin-cable pull-push set-ups. I suppose, once again that the original OEM 125 model throttle cable will fit.
This is the carb set-up on the Qingqi and derivatives 125 cc models. Note that it's a normal slide-type carb ( I imagine it's a Mikuni, but not sure) with a adaptor that permits a 47 mm stud pitch carb to be fitted to a cylinder head with a 65 mm stud pitch. This adaptor also acts as an insulator, used to stop engine heat being transferred to the carb by conduction. Also note the single throttle cable:
http://www.telecable.es/personales/a...m125gycarb.jpg
On the 200 cc models they go for a genuine Mikuni CV-type BST28 mm carburettor and the twin cable push-pull throttle mechanism. The carb is not bolted on, but plugs into a rubber adaptor and it's held by a round clip:
http://www.telecable.es/personales/a...m200gycarb.jpg
Once again, I think it would be feasible to obtain a high performance slide carb, Mikuni or that Molkt, round about 28 or 30 mm choke plus the Qingqi QM125 carb adaptor and throttle cable and end up with a more responsive carb set-up, easier tuning, and it would be easier to remove the enormous airbox and replace it with a K&N type pod filter. This is not advisable with the CV carb. CV carbs and pod filters don't like each other...
Note that due to the peculiarities of the CV carb, its slide substitute doesn't have to be the same choke size to obtain the same performance. A 28 mm carb can be swapped for a smaller slide one, say 26 mm without loss of airflow capabilities. This is because the internal construction of the CV carb has obstructions that need a bigger choke diameter to compensate.
Re: Got my Xian Racer exhaust and other bits, couple of questions...
Quote:
Originally Posted by
Rainer
Hello everyone!
Just received my
Quote:
Originally Posted by
Rainer
exhaust from xianracer as well as the Molkt carb, jets, filter and a new spark plug also.
I have a couple of questions that I thought you may be able to help me with! When looking down inside the exhaust I see a section of the baffling in the middle which flattens out. The picture explains what i mean:
http://img.photobucket.com/albums/v6...d/baffling.jpg
Here you can see that the baffle flattens a bit in the middle of the pipe to form a flatter hole. Is this normal?
And finally, how loud can I expect it to be? I can't fit the exhaust until next week, and I really like loud exhausts. What would it take to remove the baffles, if it is at all possible.
Thanks very much for the help everyone!
hi mate ive been looking for the stainless exhaust tips and i know you are done with this trouble. im asking now for help on finding one. hoping for your help. thanks!
