PLEASE READ!!!!! DERBI SENDA 50 PROBLEMS! ADVISE NEEDED!

[aaroncarter12...]

I have a derbi senda, partly de-restricted (exhaust still restricted) Some of the problems may be that it needs re-jetting? bare this in mind whilst reading further.

PLEASE READ!!!

gear problem:
The bike is fine going into 1st and second, however when i go to change into 3rd i need to slightly tap the lever down with my foot and then press up for 3rd, then tap it down slightly to move it up to get to 4th. DOES ANYONE KNOW WHY IT IS DOING THIS?

Throttle:
The throttle is very stiff, have to use your whole hand to twist it, im not sure if all derbi senda's are like this or i need to replace cable or something????

Weird engine problem:
when i first start the bike from cold, when i put the bike in 1st gear its fine until it gets to about half revs then loses power, same with 2nd, is this normal? does it always need a warm up?

One more problem:
sometimes even when the bike has warmed up, its running fine, then halfway down the road it cuts out, (gradually loses power as if no fuel is getting through then engine shuts off) then doesnt start for like 2-3 minutes later. This doesn't happen all the time.

ALL THESE PROBLEMS HAVE NOT ALL OCCURED AT ONCE, I LOVE THE BIKE, THESE ARE JUST THE PROBLEMS THAT HAVE GRADUALLY INCREASED SINCE IVE HAD THE BIKE.

PLEASE DONT GIVE ME GREIF, IM NEW TO BCF, I AM JUST LOOKING FOR SOME ADVICE,

ANY HELP WOULD BE GREAT, THANKS!

[_matt]

Hello and welcome to BCF!

Gear Problem:
My Jinlun does this, as far as i can work out, it's the bar that connects the gear lever to the gear linkage (should be a screw in bar, with 2 nut-looking things at either end). Adjusting that may help! Also adjusting the position of the linkage where it meets the crankcase may help (or hinder if you put it to far over).

Throttle:
Try dropping some oil down the cable (not engine oil. lubricating oil), if, when it's fully oiled that doesn't help, you could try taking the throttle cable off all together and checking how the throttle grip is held on (usually some black tape under the grip to stiffen it up). *Beware though setting it too loose will result in your accidentally pulling awesome wheelies and rear-ending cars at traffic lights (*may not occur)


Weird engine problem:
Most bikes need a warm up tbh, especially on very cold days (in the winter usually). 5-10 minutes max should suffice.If the bike has a choke, use that!
*The Jinlun takes 2 kettles of boiling water over the engine and 20+ minutes to get started in -5 temperatures. While the Yamaha takes 30 seconds on the choke in the same temp. it varies a lot per bike

One more problem:
Way to many possibilities on this one sorry.
I'd advise checking the air filter/fuel filter as a good start though, it sounds like either fuel starvation or overheating. Could even be too much fuel getting into the carb and cutting off... or could be electrical! more info required on this tbh.


*additional
I've never ridden, seen or worked on one of these bikes, but they're pretty common problems so I've given the first solutions that spring to mind.
How old is it? Has it been crashed? Have you ridden it at full throttle for the last 10k miles and red-lined the revs every second you've been on it?
Just one of those things with bikes. They do go wrong (a lot more than cars I find)!

Also, wrong forum for this really. probably belongs in "The Workshop". if you really want immediate attention stick stuff in "General chat", seems to be the most busy and "The Workshop" next
____________________
1990 Yamaha XV 535 (Alive Again!) / 2007 Jinlun Texan 125-11 (formerly 2k3, wrong details, now going rusty in the back garden )

[moppy]

First and foremost, stop using capitals like a mongtard, we can then deal with other problems you may be having.

[Rogerborg]

Is this a parody? I can't even tell any more.
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[TheSmiler]

[aaroncarter12...]

sorry, like i said i'm new, i have no clue on this site at the moment.

im working out how to remove it

[Andy_Pagin]

Ok usual legal stuff...

De-restrict a moped and it becomes in the eyes of the law a motorcycle.

You commit an offence it you don't inform the DVLA that you've re-classified the vehicle.

You have to tell your insurance company that you've re-classified the vehicle.

You can only ride it on a public road if you have at least a provisional MOTORCYCLE licence.

If you haven't done all of the above then you're guilty of riding without a licence, riding without insurance, using an unroadworthy vehicle and possibly defrauding an insurance company.

If an unmarked police car tails you at 32mph for 500 metres then he's got you.

Lose your licence, bike crushed, few hundred quid in fines. Insurance costs rocket.

Just thought you'd like to know.
____________________
They're coming to take me away, ho-ho, hee-hee, ha-haaa, hey-hey,
the men in white coats are coming to take me away.
Yamaha Vity -> YBR125 -> FZS600 Fazer -> FZ1-S Fazer

[aaroncarter12...]

[Kingstondavo]

Not as rare as you think...
____________________
Current Ride - 2010 Hornet 600

[Andy_Pagin]

[aaroncarter12...]

[aaroncarter12...]

[Boxing]

[Kingstondavo]

[iooi]

[Andy_Pagin]