Topic: What it required to build the Hot Rod engine...

[sparty]

Even based on 65/67 hp at the crank a 30+ hp increase is nothing to sneeze at in my book. Plus the added reliabilty with the upgraded studs, chains,blanceing<sp? and the quicker reving abilty gives him one hell of an overall increase in performance across the board. I figure next year we might get a better idea just how much he can get from all the work that has been done. If he can afford the tires he will go thru. And yes I'm jealous.

Yep. He already put the bike in the 11's if I remember correctly and that was on a cold track and it was his first time doing it.

High 11's.  Poor start, track was good.  60 foot mark stunk.

[Retro Rocket]

Mine used to run mid 10 secs and was only 778cc, it had the early 31 keihin smoothbores and ran on methanol.....I am hoping to take this one out to 970cc with lower compression as it was sky high for the methanol. Should be fun...

Mick

[ekim98]

Even based on 65/67 hp at the crank a 30+ hp increase is nothing to sneeze at in my book. Plus the added reliabilty with the upgraded studs, chains,blanceing<sp? and the quicker reving abilty gives him one hell of an overall increase in performance across the board. I figure next year we might get a better idea just how much he can get from all the work that has been done. If he can afford the tires he will go thru. And yes I'm jealous.

Yep. He already put the bike in the 11's if I remember correctly and that was on a cold track and it was his first time doing it.

High 11's.  Poor start, track was good.  60 foot mark stunk.

I'm sure once you get a better feel for launching your times will drop. Mine is no where near the rocket you have but the bike still had more than I was willing to ring out of it. Drag racing is a learn art and each bike presents it own set of demons to be overcome. You will master the beast. 

[754]

Why the stock clutch? what was the reasoning?

[seaweb11]

Hey there Sparty, we really do need to meet and have a beer some day;D

[sparty]

Why the stock clutch? what was the reasoning?

H-D clutch springs with OEM stock fibers and disks have been shown to work better than aftermarket fibers.  Why I don't really know.

[MRieck]

Why the stock clutch? what was the reasoning?

H-D clutch springs with OEM stock fibers and disks have been shown to work better than aftermarket fibers.  Why I don't really know.

Extra plate clutch packs are too thick and are a PITA on the street. The fiber material on aftermarket pieces is not as good as OEM as it wears more quickly and releases itself into the oil. All the roadracers and dragracers I know use OEM plates OR plates made exactly like the OEM fibers (look on Gasts's website). I have installed Hyperplates (cyro aged aluminum "steel" plates) in roadracers and some street bikes BUT have had some problems with them in regard to thickness. The Barnett springs work very well with the OEM clutch. I've had this conversation with a lot of guys. Buzz at Dynoman (who has been dragracing these bikes since they came out) is on the same page as me concerning clutch packs.

[754]

So how long does the  Honda plates last when you come off the line at 8K and slip it for the first 30 feet?

[lordmoonpie]

All the roadracers and dragracers I know use OEM plates OR plates made exactly like the OEM fibers (look on Gasts's website).

Got to agree with you there Mike - I had a good conversation with Mark at M3 about this and he swears only OEM clutch plates can handle the race punishment of an M3 CR750 engine...

[MRieck]

So how long does the  Honda plates last when you come off the line at 8K and slip it for the first 30 feet?

I'd say they last as long as any fiber plate out there. Like I said in my previous post....all the old Honda, Suzuki and Kawasaki dragracers I've ever met use OEM or OEM type plates. That also includes modern stuff like busa's etc. How material comes off a set of Barnett plates and ends up chewing up the oil pump? Plus...like I said...the Barnett extra plate packs are too thick. I always found the engagement point wasn't that good (on or off) and they made finding neutral a real PITA on the street. I haven't had any clutch slip problems with OEM after installing the Barnett springs.
 I remember reading a story about Sims and Rohm building some big NA GSXR engine for a Motorcyclist bike shoot out. Long story short they lunched the engine at the dragstrip secondary burning out the clutch. They replaced the clutch pack BUT the Barnett clutch material had clogged the oil pump.

[JLeather]

What did you do about your oil pump?  Did you just inspect the old one and hope for the best?  Is anyone out there actually reconditioning oil pumps?

[754]

Are you talking Barnett Kevlar clutches, or the older style?

I doubt I have had a Kevlar one in my bike.

how much stuff in the oil are we talking, I change mine quite a bit, and inspect it and would see it.

I am thinking of trying an APE one, if I can afford to ship it.

I found a lot of guys racinglet out the cluch much faster than I do, more or less dumpong it. Usually the first thing I would do on a stock bike was change the springs with stock plates, and they never seemed to shift hard nor last very long.

[lordmoonpie]

Of course you can solve the oile pump problem by doing a dry clutch conversion...it just might be a big job