yz426 conversion vs. gt thunder 450 stroker

[440bigborekit]

on my newest ex i wanted to do somethibg different and wanted to know what you guys think would be faster the gt thunder 450 stroker kit (deluxe)
or if i jus did a yz426 conversion plese helkp me out here guys i cant decide myself

-brian

[figair]

conversion..Cant beat the power.:D

[brian-250]

if you want reliabilty go with the GTthunder kit, great for MX and XC both.;)

[UglyMotha™]

i'm running the stroker and i just got her running right, i've had electrical problems for a while now coil did not have a good ground and took me a while to catch it, but in all seriousness my bike runs right with a piped 450 no sweat even pulls on them in some areas, but if i had a 426 engine or a 450 engine i'd still put it in my frame, yah right now I can say i got one up on a piped 450 but that's bout it, you can take the 450 hybrid engine so much farther when my 400ex engine is worked out the wazoo just to run with the piped hybrids, i can't go no farther

[rancid]

426, i just got my yfz426 going and its faster than yfz450 with a cammod, open esr filter and esr full pipe. it really pulls better and the qaud feels so light now.

[TampaBoy813]

Originally posted by rancid
426, i just got my yfz426 going and its faster than yfz450 with a cammod, open esr filter and esr full pipe. it really pulls better and the qaud feels so light now. I would have to disargee with this...I have had 2 YZ426 Hybrids and YES there fast but what a pain in the ***...if you use the quad for any thing less then racing then I would do the stroker and not the swap...2 reasons...when you do the 400ex/YZ swap the quad is not worth poop after its done...no one wants to buy the Chop j0b Hybrid...every one wants a Full Frame HyBrid...just my .02cents on this I have been dealing with the YZ swaps for some time now...the other thing is that even with a over sized radiator there hard to keep Cool for some reason...and this is with 2 diffterent quads and I have a CR450F Hybrid full frame now and I have the same problem I want to j0y ride and XC race and I am having a hard time keeping it cool with no fan in florida...

[figair]

Tampa sorry to here that,I love my hybryd..and wouldnt change it for nothing.But I do agree w/you they are a pain in the but other than the track..The pull on the hybryds is uncanny.At laest mine is..AS far as farting around in the woods and in the fields I agree Stroker it is.But just my 2 cents....:D

[TampaBoy813]

the other thing is making the oiltank and radaitor work in the same spot...I cut and fabbed mine from scrach...

[TampaBoy813]

New head stay...welded pins in the bolt holes so the nuts would not crush the frame...

[TampaBoy813]

when it was almost done...the airbox was the other thing to work out...what a apin in the ***.....used a 400ex stock box and boot...just had to move the box up about 3 or 4 im to make the boot reach...

[rancid]

looks like you did a way nice job on it. how do you think it compares in quickness compaered to the yfz450,s and honda 450,s. just want to know im not crazy.

[TampaBoy813]

Originally posted by rancid
looks like you did a way nice job on it. how do you think it compares in quickness compaered to the yfz450,s and honda 450,s. just want to know im not crazy. well my YZ426 was not any where as fast as my Modded YFZ...it had a ton of power just didnt seam to go any where fast...I think I am going to do a POST about this swap with pics and full info for people...and if you asked me if I would do it again I would have to say NO inless you go with a full frame and CR motor...only because it takes care of the oilsump BS...Dr.D makes a Sumpless kit for the YZ motor...but they dont make it any more and only have like 3 left last time I called..and they told me it was only for race...there was not enuff OIL in the motor with the kit to ride for long times...

[figair]

Man tampa your breakin my heart, reading everything you are posting...I luv my hybryd and shes wickedly fast I cant believe you said yours had power but didnt seem like it wanted to go anywhere..I say long live the hybyds....lol my 2 cents :D

[TampaBoy813]

Originally posted by figair
Man tampa your breakin my heart, reading everything you are posting...I luv my hybryd and shes wickedly fast I cant believe you said yours had power but didnt seem like it wanted to go anywhere..I say long live the hybyds....lol my 2 cents :D well I sold the YZHybrid and got a CR450F HyBrid...best race bike...but now i want to XC and it does not have a Fan so it does not work for me any more....will trade for a Nice XC quad or cash....see sig for more info

[ss440ex]

I like mine!!:D

[figair]

Damn ss Looks fricken Good:eek2: :eek2:

[spanky101]

all these hybrids looks freakin awsome...... but i have noticed if you try to sell them alot of ppl sell them (or try to sell them) for more then a modded yfz or 450r, ad when i say more i mean like 2-3g's more....and ppl just take the total meant to b quad and make it close.... so if ypu plan to sell i would say juss go for the stroker.... i have watched a 400ex/yz450 conversion go from 8,500 all the way down to 5,500, its a shame cuz the quads are sick but not good for XC and alot of places dont have alot of mx tracks.......... juss my own .02

[rancid]

never build a hybrid for resale, even a stroker is not going to give you what your into it.

[figair]

Originally posted by rancid
never build a hybrid for resale, even a stroker is not going to give you what your into it.
When do you get what you have in it?You will always lose either route you go....my 2 cents