Topic: Juha and Mike Rieck top-end

[Jim F]

well the story continues as they found that the aftermarket regulator/rectifier is bad (Electrosport) ordered a new one
and a new OEM to make sure its not just the aftermarket one
will keep everyone posted

Jim

Jim....you want GOOD luck....not BAD luck. I'll be honest.....the GS's were never known for stout charging systems to begin with. I have replaced quite a few stators and Reg/Rec units

and they think the RF might be coming from the bad R,R..............not sure but it has to be replaced

[Leino]

I have removed a couple of charging systems... 

[Jim F]

One of the Gs bikes got on the dyno yesterday and yes the cam timing was WAY off
This has a Mike Reick head (GS 850 head with mikes porting, under bucket shims and all of the good valve train stuff)
840 kit with cams and 32 mm flat slides.
stock, this motor makes 61HP and the last time we put it on the dyno it made a whopping 62 with this set up.
got the cam timing figured out (Its been so long sense I have worked on this bike that I forgot who did the cam timing)
and I dont know how too so I am not even going to try this. (Thanks David Fletcher for helping me)
Now it makes 81 with the carbs being very lean. going to change with mid range and the mains and get the carbs
back up and on the bike and back on the dyno. so far so good
well keep you posted
Jim

[MRieck]

Should find a few more HP with some extra fuel Jim.

[Jim F]

Brian seems to think about 5 more, but 23/25 Hp gain is not bad
with this set up

[MRieck]

Brian seems to think about 5 more, but 23/25 Hp gain is not bad
with this set up

I won't argue with you there Jim. Amazing what cam timing can do (or undo).

[Leino]

Brian seems to think about 5 more, but 23/25 Hp gain is not bad
with this set up

I won't argue with you there Jim. Amazing what cam timing can do (or undo).

I have a GS 750 classic-roadrace bike in my shop, someone installed hi-po cams but didn't know how to do timing properly... not sure if I know how to do it properly but I think I have an idea, thanks to MRieck 
Interesting to see what it's capable of before and after cam timing...

[Leino]

Maybe it will be worse than stock after me 

[Jim F]

it is possible Juha be-leave me. I set the intakes at 105 degrees and the exhausts at 107/108.
its a good place to start but this is just a street rider

[Big Jay]

By the way, ECR Racing in Finland is building a FJ based supercharged funnybike...

If it is using stock crankshaft, it will break them.

[Leino]

By the way, ECR Racing in Finland is building a FJ based supercharged funnybike...

If it is using stock crankshaft, it will break them.

I'm sure they will break a lot of sh1t in a hurry and do that many, many wonderful times...

[Jim F]

up date
we are up to 86 HP. went 4 sizes up to 130s and now we have about 12.7 AF
mid range a bit rich now, but we are getting in the ball park
The 1100 should be up next week too

Jim

[Bill/BentON Racing]

K, good to hear from you. did you see next years back @ Valdosta? Almost where Samauto is!!! 87.07 haha! Bill

[Sam Green Racing]

Did you get a torque reading Billy when you got the 87.07 ? I'll bet it's higher now.

Sam.

[MRieck]

up date
we are up to 86 HP. went 4 sizes up to 130s and now we have about 12.7 AF
mid range a bit rich now, but we are getting in the ball park
The 1100 should be up next week too

Jim

There you go Jim. 62 to 86...funny what cam timing and jetting can do. I'd like to see the chart when you are done. Most of the people that complain about losing all their midrange torque for "explosive" top end with most aftermarket cams really don't know much about either of those subjects.

[Bill/BentON Racing]

Samauto threw down the gauntlet!   Bill I'll check Sammy boy!

[Jim F]

The funny thing about the top end mike is that at 10K RPM, the graft hasn't leveled off, its still climbing and making HP
The crank has been welded and balanced but 10K is a good stopping point.
I will post all of the read outs when its done,

Jim

[MRieck]

The funny thing about the top end mike is that at 10K RPM, the graft hasn't leveled off, its still climbing and making HP
The crank has been welded and balanced but 10K is a good stopping point.
I will post all of the read outs when its done,

Jim

Those ports are pretty good size Jim.

[Leino]

86hp at the rearwheel?

[Leino]

Really looking forward to the 1100 or should I say 1135 dyno results

[MRieck]

86hp at the rearwheel?

Yes. I think it could pinch 90 with a few more RPM's.....like 500 or maybe 750. $hit....the crank is welded!

[Bill/BentON Racing]

Yeh Jim, c'mon man, twist that puppy til the power falls off ! Mikes porting on a CB 750 will make power way past the 9500 most are done by! Now didn't you own a turbo bike?lol! Bill

[Jim F]

86hp at the rearwheel?

Yes

[Jim F]

Yeh Jim, c'mon man, twist that puppy til the power falls off ! Mikes porting on a CB 750 will make power way past the 9500 most are done by! Now didn't you own a turbo bike?lol! Bill
[/quote
but there's not a rev limiter on it either
and yes the turbo bike should be up there in the next couple of weeks

[Leino]

Almost three weeks have gone, what's up Jim?