Im getting ready to go to big bore kit soon and I have been reading alot of threads about HPR, TVI, Pami ect.
I have spoke to 222 and he thought I should go with the 730 jug and high comp piston. Is this a good place to
start. and where should I go from there. I have about $2000.00 to spend this go around. Any Ideas? Also
I read the Eric built a 650 stock bore that was beating alot of big bores in the builders class just curious what
he did. Thanks in advance for your help. I hope I dont start any huge arguments.

 

if i had to do it all over again, i would of started with the race head and cams before i did the big bore..i think if u just do the big bore and hi comp piston without doing any head work, i think u might be dissapointed in your gains...jmo

 

Thanks for replying bigshow. Im kinda surprised that I didnt get alot more responses. Seems to be a hot topic
around here. I guess you have to be a well known member I guess. Let me ask you this for the budget that I have
(2 grand) What would you do first? Im currently running Mrhp end cap , No Toil foam filter, and jetting. I see that
your head was done by TVI. how was your luck with those guys? I spoke with them a month ago , The guy I talked
too (Gary I think) was not much help. Should I be thinking more along the lines of carb replacement, CDI, etc.
Thanks for your help, I really want to get this started.

 

very well said!! and very right. but then what are you going to do with it?

 

Scatterbrain check your PMs.

 

I'm proof that's not entirely correct.

I have a Pami 703 with NO head work. Just the dual carbs added on. And I think I've got a pretty fast DS.

Last time I had it dyno'd (2 years ago). It was at 60hp. And I'm sure it's making more now just by dropping the octane level down.

 

with only having 2000$ dollers to spend , i thought he might be better off getting pipe , carbs , cams,head work, ect ect.. if he got the big bore that would almost take up all of his cash..in my opinion, a big bore really doesnt give you arm ripping power with out the proper set-up to go with it..jmo

 

what ever you decide to go with make sure you stay with one builder. dont be like me and try to use stuff from different builders. becouse your 2 grand will be wasted and you wil have to start all over. good luck in whatever you choose.l

 

Was thinking about this a little over the weekend. I really like the Stage III Ron Wood (or equal) kit and really enjoyed the added power of the 680 (2mm larger bore) kit I had. Not the power of the 760 but, I think for the average duner more than enough power. You guys that ride at sea level and don't climb major dunes probably don't need the kind of torque a big bore has.

For $2000 I'ld look at a high compression piston, cams, heavy valve springs, heavy clutch springs set-up. This will leave you $$ for a new carb if you want it.

A high compression piston and cams set-up will get you some impressive HP gains.

The real question, are you looking to win at the drags or looking for a little more HP for trail / dune riding?

If you want to win at the drags. . . look into a NOs set-up. Viper650 has a big-bore killer and very little $ invested.

Whetever your decision, do it all at once. If that means you have to save for another year, do it. You will waste a lot of money buying things then opening it up again and buying again.

 

I am w/ everyone in here pretty much. I say go stock bore high comp,cams,springs,and with the money left over do the carb.
It should roll out nice. I think you be happier than if you had just done the cyl.
As the builder, cant go wrong w/hpr.
Justin