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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc.


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  #1  
Old 03-31-2008, 05:03 AM
GG27 GG27 is offline
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Default Making my EC250 more like an MC

I was thinking of an easy way of increasing the low end power on my EC250 is by changing over the jetting, silencer and CDI from an MC. Currently it runs very weak but smooth on the bottom and strong mid to top. I have to clutch it through slow turns to keep it on the mid-upper meat of the power band.

I know I can increase the compression by removing the gaskets and fixing the squish band but I don't want to open up the engine yet.

In what order will these changes increase my low end and by how much, if any?

I have ordered the LTR jetting kit and PV cover just to get that extra bottom.

Thanks


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EC250 2008 Skid plate, rad braces, Fork bleeders
Drz 400 Motard '03 (full spec)

Yz 250 '06, KTM exc 250 '05, exc 250 '04, exc 250 '02
WRF250 '02, KDX 220 '98, DT200R '93 all sold
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  #2  
Old 03-31-2008, 09:27 AM
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Loosenut Loosenut is offline
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The low-end will not be able to match the MC until you have head work done. It's cheap and easy, so why fight it.
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2005 GasGas EC300 (Ohlins front and rear)
2007 Yamaha FZ1
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Old 03-31-2008, 10:58 AM
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changing to the lighter mc stator/rotar combo will make a huge differance
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Old 03-31-2008, 03:21 PM
GG27 GG27 is offline
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I guess I'll change the base gaskets to one .3mm and shave the head by another .5 mm to increase the compression, since there is no reputable machine shop here in Athens to correct the dome shape and height.

BTW I looked up the parts catalog from the factory sight for the 2008 models and the MC head has a completely different part number. Should I just order that instead and check the squish with that head?

I'll also check the price for the lighter DE ignition-flywheel combo. Won;t I have to get an extra FWW for tight woods riding?


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EC250 2008 Skid plate, rad braces, Fork bleeders
Drz 400 Motard '03 (full spec)

Yz 250 '06, KTM exc 250 '05, exc 250 '04, exc 250 '02
WRF250 '02, KDX 220 '98, DT200R '93 all sold
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Old 03-31-2008, 03:46 PM
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widebear widebear is offline
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All depends how deft you are with your right hand, now the only time i use the 3k ign is for night racing, gasgas has such sweet power delivery i.m.o. flywheel weight is not required
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Old 03-31-2008, 09:58 PM
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I'm surprised, I think the low end on my '07 is pretty damn good. There are a lot of things you can do, but try some jetting changes first.
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Old 03-31-2008, 11:23 PM
GG27 GG27 is offline
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GMP,

I think you guys in the states have the lighter ignition coil. Hence the better low end.
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EC250 2008 Skid plate, rad braces, Fork bleeders
Drz 400 Motard '03 (full spec)

Yz 250 '06, KTM exc 250 '05, exc 250 '04, exc 250 '02
WRF250 '02, KDX 220 '98, DT200R '93 all sold
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Old 04-01-2008, 05:09 AM
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iancp5 iancp5 is offline
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Quote:
Originally Posted by GG27 View Post
GMP,

I think you guys in the states have the lighter ignition coil. Hence the better low end.
How does that make it a better low end? Surely it just revs quicker?
Or from my perspective just stalls quicker
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Old 04-01-2008, 11:36 AM
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The flywheel has nothing to do with torque, it just dampens changes in RPM. If its snap your looking for than yes, the 2K-2 helps with that. I can see where finding more off idle torque by other means will help the bigger flywheel spin up a bit quicker. I like the lighter 2K-2 ignition with a small weight and G2 throttle, 200 cam.
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  #10  
Old 04-01-2008, 11:47 AM
GG27 GG27 is offline
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GMP

What other means do you suggest apart from LT jet, PV cover and base gasket- head shave? I have already ordered the jet kit and PV cover and I hope they will help the low down torque of this otherwise fantastic bike. I have geared down to 13/50 also.
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EC250 2008 Skid plate, rad braces, Fork bleeders
Drz 400 Motard '03 (full spec)

Yz 250 '06, KTM exc 250 '05, exc 250 '04, exc 250 '02
WRF250 '02, KDX 220 '98, DT200R '93 all sold
Reply With Quote
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