Dyno results @426 hours

I and the few people that were with me had guessed it would make 45-49 hp.

One of the guys has ridden it and like me, doesn't believe it is @50 hp. It spends a fair amount of time at the throttle stop compared to 200+ hours ago.

I had wanted to be safe so changed the main from 160 to 170 a few months ago.

I don't have the jetting specs on hand right now, I'll try and find them, and it needs some changes.

2005 FS650 with 426 hours. It's had new valve springs @~200 hours, also a couple timing chains, and a few sets of cfb's.

Rotella 15-40 Dino oil since 150 hours.

I'm not sure, but it's possible it's corrected to be crank HP which would explain why it's higher than expected. Is that what that means in the last pic (crank corrected?)

It's running pretty rich.







Nobody else was interested in dynoing their bikes. (DRZ400sm, 8 of them)

The dyno was at the new honda dealership at the bike night.

Well I put the 160 main back in and now it's got a mushy feeling when whacking the throttle open. It feels like the clutch is slipping.

Not that I hoped it would fix that issue, I tried to take the pilot jet out without removing the carb and stuffed it all up. I think I broke it.

I might need a really small easyout to remove it once I have time to pull the carb.

I don't remember what's in there, (48?) but it wont stall the bike when I turn the fuel screw all the way in. It's set at 1/2 turn out. I have a 40 in my spares I think needs to go back in.

I wrote everything down and put it somewhere I don't know about (｀_´)ゞ

I heard you are supposed to make just one change at a time.

I did that on Friday, 178 to 160. It was a 178 i had innit not a 170.

Then last night I got the 48 pilot jet out, and put a 45 in.
Raised the needle one clip position.
Set the fuel screw @ 1-1/2 turns.

Going to ride up to the mountains and see how it works.

Although you can swap pilot jets out in situ, maybe it's not a good idea.



Dyno was @………………Now
NCVR @ 2nd clip……...NCVR @ 3rd clip
178 main…………………..160 main
48 pilot………………………45 pilot
1/2 fuel screw...........1-1/2

AP set at .25 seconds,......Same
and only from closed
throttle..

Now at 480 hours. Valve clearances were in spec last check, the oil is looking great at 6-8 hour intervals, no metal on the screen or magnet.

The cfb's and timing chain were replaced at 350 hours. 8 clicks left on the cct.

I forgot to mention earlier... my tps has been disconected since I bought it at 150 hours.
That, and the kush hub and regular oil changes has possibly helped eek out so many hours out of a stocker engine.

A DRZ went on the same dyno at another Bike meet a few weeks after mine, it made 39 horsepower. It had a full FMF and airbox mods, rejet, and showed a good air/fuel ratio.

The TPS sends a signal to advance the timing more than the default rpm based curve.

It does so in a few conditions, one being high load and part throttle.

Lugging it in too high of a gear is one instance.
Also, going down a long steep hill, with the throttle closed... it will pop all the way down.

It still has a high load, as the engine braking is slowing your progress.

With it disconnected, there is very little popping or backfiring on decel.

The advanced timing results in unnecessary violence in the combustion chamber, and on the piston/rod/crank/bearings ect...

Well, I had my last ride on the old berg a few weeks ago.

Was a great ride, about 60 miles of bad dirt road.

I knew it was thoroughly tired, it was leaking a lot of oil so I trucked it up to 5,000' and met up with everyone who rode up from the valley (400').

Changed the oil the next weekend prior to a ride I planned on doing.
And...
Found some metal on the magnet I'd never seen before.
And...
It makes a knocking sound once warmed up, that is likely the main bearings.

543 hours, ~21,000 miles.
I'd never opened the bottom end, it has the same piston, rings, and valves.
Only work done is:
Cam follower bearings "rocker arm bearings" (x3)
Timing chain (x2)
Dual valve springs and head gasket
Water pump shaft seal (x2)
It broke down one time, an exhaust valve spring broke.
Ran out of fuel a few times.
Crashed it 3 dozen times.



*It has had Rotella T every 5-8 hours with a new filter every 3rd or 4th oil change...since ~200 hours.
Valve checks every 30-40 hours.

*The TPS has been disconnected since 200 hours.
It advances the timing in certain situations and can cause detonation.
You can barely tell a difference plugged in or unplugged.
It lessens the initial hit slightly.

*It is jetted just slightly rich, it always started right away with or without choke depending on ambient temperature. It got a consistent 42 mpg.

*it has a Cush hub.

*I seldom lugged it ever... I would ride it at 65 in 5th gear rather than 6th at that speed. 75+Mph would be 6th gear.
In fact, I always chose to ride it a gear lower than necessary, at any speed.
It had 16/45 gearing for most of its life, and 17/47 later.

There you go...