To bore or not to bore

[nyj]

I'm about to order some parts to make the DRZ SM a little more fun. I planned on doing the bore kit, but after some consideration, I'm thinking it may be a better idea just to do the FCR carb and some cams. I say that because I'll be getting a bigger bike in a few years, and quite frankly, the DRZ isn't as slow as some make it out to be.

Are the cams even worth it without the bore kit? Is the FCR even worth it without cams/bore kit? Would love to hear opinions. Would like to order this week.

[Smias]

Fcr 1st of all !

[nyj]

and to clarify, I was going to do it all at once. fcr/cams/bore. not just start with a bore kit or anything.

[matt 2778]

The typical mod schedule most follow is

1. 3x3 and jet kit

2. Fcr and exhaust (mrd or yosh ti)

3. Big bore and cams - if your going to crack into the motor may as well get things done in one shot.

That being said I'm currently running all the aforementioned mods and after installing the bigbore and cams is when the bike really started to rip but I got significant performance from each stage of modding. You can continue on up to 60hp power but after the big bore and cams horsepower gets really expensive.

[TLRDoug]

I have the cams (Old Stage II), FCR and the MRD exhaust, 3X3, E Model ingition Box, Eddie's Coil, and added springs for a 250 pound fat guy (I weigh 222 now) and it is great. I plan on doing a big bore and some valve refresh this fall/winter and stroke it with a big valve RHC upgrade next year. Also I will go though the tranny and replace all the bearings and such in the engine and the swingarm/steering head next year. Finally the shift forks are always worth a look while you are in there. Of course I will have to buy a 41mm FCR when I go big bore, but I am sure I can move the 39. I have never made a mod to the DR-Z that didn't improve it a lot. I love rolling the throttle in first-third and bringing up the front. I can really drive out of corners at the track as well. The other most important mod was the Seat Concepts seat, woo hoo that made it sweet.

Final answer, get the big bore, not enough negatives to avoid it, and it is easy to do.

[Qqqqqqqqqqqq]

yes ... do it

[nyj]

But the big question: is $1300 worth a 10ishHP increase?

[matt 2778]

Do you have a pipe yet? The fcr and the mrd should be right around $1100 and get you close to 10hp. The big bore and cams will bring similar gains at a cost of around $600, however keep in mind the carb and pipe will boost the performance of the big bore and cam which is why the motor mods usually follow the carb and pipe. Personally I wouldnt just do the big bore or the cams separately as I hate doing the same labor twice.

[matt 2778]

But the big question: is $1300 worth a 10ishHP increase?

That's a pretty subjective question that only you can answer. For me it was an easy yes.

[nyj]

Where are you getting your prices on the BB kit and cams? I already have a full yoshi titanium.

I don't want to just get a 39mm carb and if I feel like it, bore it later on. If I'm going to spend money, I'm just going to either go fcr/cam/bore or say it's not worth it and just get the carb and cams.

[matt 2778]

http://www.bonanza.com/listings/Cylinder-Works-Big-Bore-Kit-LTZ400-KFX400-DVX400-DRZ400/18306484 here's the bb for $400 (I've seen it cheaper)

Here's a set of hotcams http://item.mobileweb.ebay.com/viewitem?itemId=230689154249.

So my bad your closer to $650.

[nyj]

well shit, at those prices you might as well do it all. lol

I was looking at thumpertalk store and epicmotorsports (part of eddies site).

If anyone can chime in with where they bought all of their stuff from, that would be great. I think I'll buy the FCR from Eddie since he sets it up.

So, if I'm going to do cams and bore, I need the FCR 41mm?

[matt 2778]

well shit, at those prices you might as well do it all. lol

I was looking at thumpertalk store and epicmotorsports (part of eddies site).

If anyone can chime in with where they bought all of their stuff from, that would be great. I think I'll buy the FCR from Eddie since he sets it up.

So, if I'm going to do cams and bore, I need the FCR 41mm?

No you want the fcr39. The 41 only works well with big bore stroker's.

[matt 2778]

well shit, at those prices you might as well do it all. lol

I was looking at thumpertalk store and epicmotorsports (part of eddies site).

If anyone can chime in with where they bought all of their stuff from, that would be great. I think I'll buy the FCR from Eddie since he sets it up.

So, if I'm going to do cams and bore, I need the FCR 41mm?

No you want the fcr39. The 41 only works well with big bore stroker's. Also you should probably talk to Eddie first as I've heard he'll build up packages.

[nyj]

No you want the fcr39. The 41 only works well with big bore stroker's.

Like the Athena's kit? How much more $$ would I be looking at if I went that route?

[matt 2778]

Several thousand and your looking a rhc cams and valves + 4 stroker and someone very talented (ssw) to massage the cylinder head. That is why most people quit at the 48hp drz(which is a huge difference from a stock bike).

[nyj]

oh, nevermind then! haha

fcr 39mm from Eddie

cylinder works BB kit

intake/exhaust hot cams (stage 1, I guess?)

What else am I going to need?

[matt 2778]

Service manual, copper coat , decent torque wrench, all essential fluids and lots of patients. I'd suggest several evening of research and note taking on this forum. Failure to install this stuff properly is very frustrating as well as expensive.

[nyj]

thankfully a friend of mine is a well versed motorcycle mechanic. If Erik were home, I'd be offering him $$$ to do it. lol

thanks for the help, Matt!

[nyj]

thankfully a friend of mine is a well versed motorcycle mechanic. If Erik were home, I'd be offering him $$$ to do it. lol

thanks for the help, Matt!