08 ds 450 turns over slow and wont start please help?

[thecount]

i have a 08 ds450 that turns over but it wont fire up with the electric starter.i have to push it everytime i ride it after its warm it usually starts with the button.I have put new starter oem and it still wont help it.also i put a ytx12bs battery which is bigger and nothing.when i push the start button it just frlips over but not very fast at all.just cant figure it out.

[bad moose]

Sounds like a loose conection or switch.

[hcomras]

Or a bad spark plug boot...that's what mine did...

[fast507]

1. Clean and check the connections at the Battery terminals, Solenoid, Starter switch, and Starter. Check feed wires for fraying, cuts or evidence of damage.
2. With Clean terminals, Load test the Battery: Available for free at most Pep Boys / Auto Zone Stores if you don't have a Test Box.

IF the battery tests good, It gets a bit more complicated from there.

1. Does the starter get very hot when cranking? Indicates an excessive load, low current and a possibly bad starter.

2. When is the last time you replaced your spark plug? Gap erosion will cause hard starting. Switch to an irridium plug. Check boot, wire and coil accordingly

3. Fuel quality and pressure, replace gas with fresh stuff and clean the fuel filter if there is one on yours. LTR's are notorious for this, I keep 4 Suzuki fuel filters in stock at all times. Today's gas blends, especially near Chicago, DC, D-FW, NYC and Cali can go bad in just few weeks due to the sh*tty fuel blends they use to reduce smog.

IF the simple stuff doesn't remedy it:

1. Check valve lash tolerances. Tight valves will mimic the symptoms you speak of.
2. Modified motors will start hard if the fuel curves are not properly set. Is your motor a mod motor? Even slightly?
3. Check Compression. Compression on a warm motor will be higher due to the heat swelling of the piston and the sealing action of the oil film on the rings. Low compression will cause hard cold starting.

[fast507]

Start simple first, move to the complex stuff next.

[thecount]

actually this is a jeremy lawson bike i bought from florida has a mod motor for sure used to turn over great now it just goes slow n wont start.also has a brand new starter.

[Ryan87]

Quote: Originally Posted by thecount

actually this is a jeremy lawson bike i bought from florida has a mod motor for sure used to turn over great now it just goes slow n wont start.also has a brand new starter.

check your valve clearances.

[CANAMracerdad]

Ck battery first , then go through the simple tests first leading upto the more complicated.
Let us know what you find

[fast507]

See if the decomps are operational on your cams if nothing else works

[thecount]

pretty sure i found the problem its the key switch.