i need help choosing which kit to get. I'm a big man for the ds at 6'2 350lbs. I do some hill climbing, mostly trail riding, play in the sand every once and while. Currently only have woods cdi and alba exhaust. I know I need a carb yet, but I will make that decision when I decide on which cam and piston kit to get. Any help would be appreciated.

 

Get TVI'S if Gary still has it. It was very reliable and it was easy to install.

 

The stage II really depends on the cam and piston you choose, and yes, you're first decision should be a carb.

**Carbs**

Ron Wood Racing's TM45 or the Mr. Horsepower's Lectron46HV - Depends on how much money you want to spend. From reading all the posts, you'll get a few more ponies out of the Lectron. Make sure you consider a ported intake for either.

**Cams**

Web Cam Choices

110 Grind : Intake lift .395 in. and duration 284 degrees (intake and exhaust). These cams and provide good overall sport performance over stock. Dual Performance valve springs recommended.

109/110 Grind : Lift .425 in. intake / .395 Exhaust with duration 287 degrees intake and 284 degrees exhaust. These cams provide a good boost in Low end power and increase in high end power over stock. Dual Performance valve springs required. Shim Under Bucket springs can also be used.

109 Grind : Lift .425 in. and duration 287 degrees (intake and exhaust).These cams offer excellent power gains in mid and high rpm racing. No loss or gain at low RPM. Shim Under Bucket valve springs required.

Ron Wood Choices:

Axtell : Intake lift .433 in. duration 267 degrees, Exhaust lift .406 in. duration 278 degrees. Clearance .008-.010 in. These cams are commonly known as A1/A2 cams and provide good overall sport performance over stock.

Wood9 : Lift .425 in. duration 260 degrees (Intake & exhaust). Clearance .006-.008 in. These cams are great for extra mid and high RPM performance with no loss over stock at low RPM.

Wood7 : Lift .450 in. duration 294 degrees (Intake & exhaust). Clearance .006-.008 in. These cams are strictly for high RPM power.

For you, I would say a Web '109' Grind, or a Ron Wood 'Wood9'.

**Pistons**

I believe in the Mr. Horsepower 14:1 piston, very good torque at the low end and nice mid and high end power - and a nice compliment with the cams listed above. If you are a bigger guy, thats a good mix - for really good overall power. Ron Wood also makes a variety of high compression pistons too, just not as high as the 14:1. A lower compression piston (below 14:1) will provide you with less torque and less low end power for riding in the woods - for us bigger guys, higher compression is the key.

** Conclusion **

The right stage II mix with the recommendations above should produce horsepower increase of 50% to 60% over stock. The stage II components (14:1 piston, Web 109 Grind Race Cams, Shim Under Bucket Racing Valve Springs, & 1 headgasket and 2 basegaskets) alone (excluding the carb) should be around $900 for the parts. Down the road, you may consider Head Porting by a professional as well. We've seen well built and tuned stage II kits with good carbs being dynoed in here at over 60 horsepower!

Marky

 

you might want to look at a 720, lot more power than the stage 2

 

Hey Marky, quick correction for you on the cams. The Ron Woods 9 cams are the same as the 109 Web cams. Ron Woods gets them from Web. The Ron Woods 260 degree is figured @50 and the Web 109 is 287 figure @20 if memory serves me correct, wich equates out to be 260 @50.
If I were to do it all over again I would have never done the 720 kit at all! Probably because I was the Test subject for everyone and I spent way to much time and money when I could have relaxed and been riding.[img]i/expressions/face-icon-small-disgusted.gif[/img] Until someone makes a cast cylinder in a 105mm bore with Nikasil I wouldn't waste my time. I would go with everything I have now and have it punched out to a 102mm and re-nikasiled and put a 14:1 piston in.

 

If you don't mind running race gas, go with Markys suggestion, he may know where to get the parts. If you want to stick with prem gas the 720 (TVI) with 11.5 piston (or what ever he uses) will be your better choice.

 

doesn't Mr HP's lightweight pistons come in different comp ratios?

 

I was always under the impression that the 720 needed race gas.

 

Yes it does!

[img]i/expressions/face-icon-small-smile.gif[/img][img]i/expressions/face-icon-small-happy.gif[/img][img]i/expressions/face-icon-small-smile.gif[/img]

 

See more options! [img]i/expressions/face-icon-small-smile.gif[/img]

I think Mr. HP can set you up nicely!