Question about 2008 Derbi Senda Xtreme 50 SM

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Derbi Senda 50 (2008) - Bike has no power when revved - owner before me has changed to second hand after market exhaust and installed nr 80 carburretor jet. I have replaced exhaust with new technigas G box exhaust but bike still lacks top speed. Have tried larger jet but bike then bogs down. New reeds have just been fitted. Any advice would be appreciated.

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Hi, John45545 and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
For more information about your question and valuable free downloads that you will need please visit the website below. Good luck and have a nice day.
Derbi senda running issues loss of power at high revs
http://www.apriliaforum.com/forums/archive/index.php/t-148874.html
Derbi GP1 50 cc Workshop Manual
https://www.oemmotorparts.com/oem2.asp?M=derbi
http://www.derbi.com/fr/images/stories/modelos/37/manual.pdf

Posted on Mar 03, 2016

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Posted on Jan 02, 2017

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SOURCE: Drain and change oil

I can't tell you all the particulars from the limited amount of pictures of your bike. -Remove the oil drain bolt on the bottom of the crankcase (the universal bolt size for bikes use a 17mm wrench). -Drain the oil (remember to recycle). -Re-install the drain bolt with a new sealing washer if necessary. -The oil fill cap should be some where on the top of the crankcase. About 1 or 25mm in diameter with a raised tab for turning. -Fill with recommended oil. -There are 2 ways to check oil level on dirt bikes: 1) Oil level check bolt. On the right side cover. 2) Oil level site glass. A 1 round piece of glass on the side of the crankcase. Usually by the kick start & R brake lever. -Always check the oil level with the bike upright (as if you were sitting on it). -Check bolt - fill with oil slowly until oil comes out of the check bolt and re-install it. -Sight glass - fill with oil to cover 3/4 of the sight glass. -Remember to hold the bike upright when adding oil.,

Posted on Nov 10, 2008

landsend
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SOURCE: clutch and pistonring

on the internet.

Posted on Mar 24, 2009

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SOURCE: 50cc 1999 derbi senda

Hi
Decarbonise the exhaust system.

Regards
Phillip

Posted on Oct 16, 2009

  • 108 Answers

SOURCE: MY SON HAS DERBI SENDA AND SOMEONE HAS MESS WIRING

The problem is that one of the bulbs has blown or you have a bad earth connection on one of the black wires coming from one of the indicators,clean connections with wet and dry sand paper. Finally check the wattage of the bulbs is correct something like 3-5 watts ,

Posted on Feb 12, 2010

Testimonial: "cheers i will give it ago today many thanks"

  • 1 Answer

SOURCE: fitting back kick start spring mechanism derbi

Hi I have a derbi senda sm 2005 Just brought a kickstart shaft but carnt rember how to fit it n how the springs go If any1 can help please let me no

Posted on Mar 18, 2010

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