LTR rebuild

Duster · #**121** (**permalink**) 03-19-2010, 01:51 AM

Quote: Originally Posted by TibGT

Quote: Originally Posted by nkeen07

The kicker doesn't get rid of much weight on the Kawi if that's the benefit you're looking for. It's just better for fast dead engine starts. It retains the stock battery to power the EFI, so not that great of an addition for motocross.

So why is it on the kfx you need a battery yet even with a kickstart but on dirtbikes or even I think the LT-R you can take the battery off if you got a kickstarter? Sorry for the newb question but I'm just curious.

The answer to that is that it is actually how the KFX is hard wired.

You can crank the KFX, leave it running, and then disconnect the battery and it will die instantly... even if it's revved up good.

In looking at the wiring diagram... which actual point in the wire routing circuits that makes this a fact hasn't jumped right off the page for me yet though.

It breaks a required circuit though... and "how" is probably honestly masked in the way they laid out the drawing.

I'd say it's likely a way the regulator/rectifier is wired in and supplies power to the system from the stator... that has it's path broken somehow by disconnecting the battery cable (no power at all entering the main system) or some way that the ECU is carrying out a default action.

Duster · #**122** (**permalink**) 09-02-2010, 03:53 AM

walshy... I have a question for you...

Since you seem to like kick start quads so much... do you have any idea if any of the ones you have owned could have used the dirt bike motor flywheel weights???

I'd give up electric start for a kick 450 w/dirt bike flywheel weight.
(for mountains/woods)

walshyfz86 · #**123** (**permalink**) 09-02-2010, 07:18 AM

I am not sure. if you run a bike flywheel you might have to run thebike stator to. But with the kicker you can get the oneway bearing off flywheel and starter gear. You can loose almost a pound off the crank.

DEVIN56 · #**124** (**permalink**) 09-02-2010, 08:54 AM

THE O4-05 Hondas you can swap out the stock fly wheel, ignition, carb and I believe cams with the CRF dirtbike. i know the ppl that switched this all up say its a TON faster.

DEVIN56 · #**125** (**permalink**) 09-02-2010, 08:59 AM

Quote: Originally Posted by walshyfz86

ill never go back to electric start or FI there 2 big pain in the ass cluttered messes for me. It starts in 2 kicks cold. but wont start hot. i have to check out jetting and so forth

I agree 100% about E-Start and EFI.

Duster · #**126** (**permalink**) 09-02-2010, 11:03 AM

Quote: Originally Posted by walshyfz86

I am not sure. if you run a bike flywheel you might have to run thebike stator to. But with the kicker you can get the oneway bearing off flywheel and starter gear. You can loose almost a pound off the crank.

Loosing that much rotational mass off has to rule for you MX guys... wow...

You're right though... in the case of the KFX anyways, it's the one-way bearing and starter gear that are in the way for me ADDING a bike flywheel weight for the KX (I think). Like from Stealthy Offroad....

From what you are saying though, it sounds like it would be counter-productive on what I would be trying to accomplish... I want to ADD, and it sounds like I shed more than I would be adding with say a 13 oz flywheel weight.

I guess I will just look at some diagrams of other brand bike/atv and where their weights mount up at.

Duster · #**127** (**permalink**) 09-02-2010, 11:32 AM

Quote: Originally Posted by DEVIN56

THE O4-05 Hondas you can swap out the stock fly wheel, ignition, carb and I believe cams with the CRF dirtbike. i know the ppl that switched this all up say its a TON faster.

I bet it is a ton faster on the MX track for sure...

The TRX450R is probably the route I am going to have to go I bet.
Trading one TRX for another is what I have in mind basically...
TRX400 >>> TRX450...

Basically I'd like to have more power than the 400, but don't want to loose that stall resistance for back in the woods. I want it to be good for me to ride the really bad trails with... and also easy in that way for my friends to ride... buddy bike.

I really think this is one of the things my one riding buddy has done to his TRX. National motor + CRF flywheel weight.... cause about like his is what I am looking for. It don't even have to be that powerful... just that stall resistant. A stock TRX motor plus the flywheel weight would be good I think.

It's either that or try building the 400 and see if it is enough, which I doubt.

nkeen07 · #**128** (**permalink**) 09-02-2010, 02:53 PM

Duster, if you aren't racing I'd be keeping that 400 man. Those long stroke thumper 400ex's will lug any gear you want them to. I've got an 04 TRX450r w/a 480 kit right now and it'll lug, but it's way more top-end happy than those 400's ever were. It's not really that great of a motor for just trail riding.