Author Topic: MRieck, you're a genius!! (Read 4624 times)

scondon · « **on:** October 22, 2005, 05:58:50 PM »

Yippee-#$%* and hot damn!!! I put that med. competition baffle in the Kerker today and it took care of EVERYTHING! Bike is wicked fast and has SCARY accelleration in the mid-top end. All the advice you've given me for this engine has been spot on. So here I am saying "Thanks!" once again.

I'm taking it out tomorrow for a day of ranch roads and coastal twisties. I'll be bringing a camera so hopefully I'll finally get a pic of this "City Sleeper" posted to the gallery.

MRieck · « **Reply #1 on:** October 22, 2005, 06:50:04 PM »

I wish my wife felt the same way about me Sean

Thanks for the compliment and I'm excited for you. It's been a pleasure helping you out sir.

MRieck · « **Reply #2 on:** October 22, 2005, 06:51:14 PM »

Oh yeah......lets see some pics!

Sam Green Racing · « **Reply #3 on:** October 22, 2005, 07:44:47 PM »

Sean,

I am well pleased for you, don't forget you have a lot of new components in that big mill, don't thrash it to hard.

scondon · « **Reply #4 on:** October 22, 2005, 09:23:31 PM »

Hard to believe I've already got 900 miles on the new engine. I gave it a couple "hot" runs through the gears during the first 100 miles, never going above 7 grand. Then it's been the freeway to work and "twisties" on the way home. The rings seem to have seated well as I'm not burning any oil.

As soon as I hit 600 miles I tried a speed run. Got it up to 115mph before shutting down. The engine had more but I was running out of road and the rpm's were getting high( around 8 grand ). The bike is really smooth on accelleration and I'm sure it'll handle higher rpm's, but on Mikes advice I'm taking it easy above 8 grand. I'm in no hurry to find what the max is 'cause it's already too fast for most of the bumpy roads around here

Also, my ego doesn't want to admit this, but I've got at least a thousand miles of riding to do on this bike before my riding experience catches up enough to where I'd feel comfortable "pushing the limits" with this beast. Did I mention that it's SCARY fast

Sam Green Racing · « **Reply #5 on:** October 22, 2005, 09:48:05 PM »

You did, but when are you going to have it on the dyno.?
Have you got a dyno close by. ?
I am itching to find out what it is kicking out as our new motor will be in a similar state of tune.

Sam.

Sam Green Racing · « **Reply #6 on:** October 22, 2005, 09:58:33 PM »

P.S. Have you got a local drag strip ?

scondon · « **Reply #7 on:** October 22, 2005, 10:14:22 PM »

I've been waiting to get the jetting and exhaust sorted out before spending money on a Dyno. I think it's ready now and I'll be asking around for a good place that's local. I'm curious as well. I'm sure that a decent set of race carbs would get even more out of this engine. It's gobbled up everything i've thrown at it and still it seems hungry for more.

We've got Infineon raceway not too far from here and as soon as I get some proper riding gear I plan to take advantage of one of their "track days".

Sam Green Racing · « **Reply #8 on:** October 22, 2005, 10:22:34 PM »

There is a drag meeting this Wednesday Oct 26th, borrow some leathers

MRieck · « **Reply #9 on:** October 23, 2005, 10:33:08 AM »

Quote from: scondon on October 22, 2005, 10:14:22 PM

I've been waiting to get the jetting and exhaust sorted out before spending money on a Dyno. I think it's ready now and I'll be asking around for a good place that's local. I'm curious as well. I'm sure that a decent set of race carbs would get even more out of this engine. It's gobbled up everything i've thrown at it and still it seems hungry for more.

We've got Infineon raceway not too far from here and as soon as I get some proper riding gear I plan to take advantage of one of their "track days".

The dyno can really help put the finishing touches on the carb tuning Sean. Your air/fuel ratio should be about 13 to 1 across the board.

Sam Green Racing · « **Reply #10 on:** October 23, 2005, 06:00:19 PM »

I second that

scondon · « **Reply #11 on:** October 24, 2005, 01:01:14 PM »

Sunday's ride was a blast. The most significant improvement this engine brings can be summed up in three words... Sport Bike Passing

I did manage to get a couple pics and will post them tonight.

Quote from: MRieck on October 23, 2005, 10:33:08 AM

The dyno can really help put the finishing touches on the carb tuning Sean. Your air/fuel ratio should be about 13 to 1 across the board.

Should I just plan on bringing a handful of different jet sizes when I get it Dyno'd? This would be my first time so I really don't know what to expect. There's a place that will do all the work but it's around $400 and I'm not sure if they'll do bikes this old. One of the local motorcycle clubs supposedly got a Dyno and I can see about renting time on it, but I'd be doing all the neccesary tuning I guess.

MRieck · « **Reply #12 on:** October 24, 2005, 02:20:57 PM »

Quote from: scondon on October 24, 2005, 01:01:14 PM

Sunday's ride was a blast. The most significant improvement this engine brings can be summed up in three words... Sport Bike Passing I did manage to get a couple pics and will post them tonight.

Quote from: MRieck on October 23, 2005, 10:33:08 AM
The dyno can really help put the finishing touches on the carb tuning Sean. Your air/fuel ratio should be about 13 to 1 across the board.

Should I just plan on bringing a handful of different jet sizes when I get it Dyno'd? This would be my first time so I really don't know what to expect. There's a place that will do all the work but it's around $400 and I'm not sure if they'll do bikes this old. One of the local motorcycle clubs supposedly got a Dyno and I can see about renting time on it, but I'd be doing all the neccesary tuning I guess.

Hmmmm.... 400.00 is awful steep Sean. I have fuel maps made for fuel injected bikes and it is between 200.00 to 250.00. The carbs do take more time as you have to physically change jets, needle height etc. If the operator knows what he is doing he should be able to get it close quickly. You will need to bring jets no matter who you use. Are you using early or late model carbs? I can send you some dyno chart pics with the AF chart.

scondon · « **Reply #13 on:** October 24, 2005, 02:57:47 PM »

Quote from: MRieck on October 23, 2005, 10:33:08 AM

Are you using early or late model carbs?

Thanks Mike, I'm using what I believe are '76 750F carbs. I don't know where to look for identifying #'s on them so I'm just going by physical appearance. Sirius has main jets, 105 thru 120, available in a package. Right now I've got sets of 105,115,120,and 130's. No source for idle jets.

Quote from: MRieck on October 23, 2005, 10:33:08 AM

Hmmmm.... 400.00 is awful steep Sean. I have fuel maps made for fuel injected bikes and it is between 200.00 to 250.00. The carbs do take more time as you have to physically change jets, needle height etc. If the operator knows what he is doing he should be able to get it close quickly. You will need to bring jets no matter who you use.

Yeah, $400 sounded pretty high to me too. Right now I'm just asking people I know, but I'll probably whip out the phone book this weekend and start calling shops.

Quote from: MRieck on October 23, 2005, 10:33:08 AM

I can send you some dyno chart pics with the AF chart.

That'd be great! Then all I'd need to get is the book that desribes what that is

The Dyno tuning falls in with the cam degreeing I just did i.e. I have no clue but I'm gonna do it anyway, yes sir! The cam degreeing made complete sense once I actually did it and I expect the Dyno to be the same. I just want to come prepared.

Sam Green Racing · « **Reply #14 on:** October 24, 2005, 03:54:32 PM »

Hey Sean,

Before you go running of to the dyno remember one thing, it was me that wanted to know the output of your motor.
You hav'nt mentioned that the motor needs rejetting, you have said it's as fast as scary #$%*.

Why not do a plug chop to give yourself an indication of how it is combusting.
Get the motor warmed up, then run it upto about 8k in the lower gears.
When you hit 8k in 3rd pull in the clutch and kill the motor dead, don't let it tick over and don't come off the clutch leaver untill you have stopped.
Pull your plugs out and check the colour, easy!

Sam.

scondon · « **Reply #15 on:** October 24, 2005, 04:21:34 PM »

Yeah, I forgot to bring my plug wrench with me yesterday as I had planned to do just that. Because of the fresh rings and pistons it was kinda difficult to get an accurate reading due to oil getting past the new rings. I put in fresh plugs when I changed the baffle and I'll bring a plug wrench with me tomorrow.

It runs great at full throttle. Any carb adjusting/fine tuning will probably be just for low-mid range. When it comes to adjusting carbs I consider myself a novice. I can change jets and fiddle with the mixture screws but thats about it. Carbs are my new frontier

Sam Green Racing · « **Reply #16 on:** October 24, 2005, 04:28:23 PM »

Can't help on that one Sean, all my bikes have just one carb.
When it comes to sorting any changes on the CR we send it to the dyno

MRieck · « **Reply #17 on:** October 24, 2005, 04:59:12 PM »

Quote from: samcr750 on October 24, 2005, 03:54:32 PM

Hey Sean,

Before you go running of to the dyno remember one thing, it was me that wanted to know the output of your motor.
You hav'nt mentioned that the motor needs rejetting, you have said it's as fast as scary #$%*.

Why not do a plug chop to give yourself an indication of how it is combusting.
Get the motor warmed up, then run it upto about 8k in the lower gears.
When you hit 8k in 3rd pull in the clutch and kill the motor dead, don't let it tick over and don't come off the clutch leaver untill you have stopped.
Pull your plugs out and check the colour, easy!

Sam.

Sam is master of the asphalt dyno I see.

Make sure the plugs are clean, or new, prior to a chop is the only thing I'd add. On the dyno do 3 pulls to get a true reading. You should notice power go up each time and start from there. The early carbs are very easy to get to the jets which should reduce cost.You should have every jet between 115 to 128 or 130. I'll check out my collection . I don't need small round Keihins anymore. Also theearly carbs have adjustable needles- these are more of a pain to adjust. Sam and I are used to CR's- adjustments are a 5 minute deal except for idle(or low or pilot) jet.

Sam Green Racing · « **Reply #18 on:** October 24, 2005, 06:22:24 PM »

Have you done it yet ? You have been on here for two hours

scondon · « **Reply #19 on:** October 24, 2005, 06:26:30 PM »

What range of the throttle would I be adjusting by changing the needle clip position? I'm guessing that at WideOpenThrottle it's just the main jet size that matters, but that raising or lowering the jet needle would affect the mixture at 1/4-3/4 throttle. Is this correct?

Somebody please send a pic and/or source for these CR carbs. I've got the next project waiting in the wings and it will definitely NOT be stock.

As promised, here's a few pics of the bike from Sundays ride. I parked it in front before hitting the roads and it never relinquished that position

That's me on the right with the "ear to ear" grin

scondon · « **Reply #20 on:** October 24, 2005, 06:28:56 PM »

I t y p e r e a l s l o w, S a m

scondon · « **Reply #21 on:** October 24, 2005, 06:54:28 PM »

I keep forgetting about the great FAQ section this site has. I spent a little time reading through the carb section and it answered my previous question(s) about my carbs. Still curious about those CR's though.

Sam Green Racing · « **Reply #22 on:** October 24, 2005, 07:01:09 PM »

I have just been on the gallery to find Mikes bike but can't find it.

Mike will be able to give you all the details.

We have run them for 2 years now with no problems at all.

Sam.

eldar · « **Reply #23 on:** October 25, 2005, 08:05:49 AM »

What all did you do to the engine? Sounds like it goes really well and some time when I may actually have some throw around cash, this sounds like the way to go.

scondon · « **Reply #24 on:** October 25, 2005, 08:32:19 AM »

Quote from: eldar, Master of the K8 Thunder! on October 25, 2005, 08:05:49 AM

What all did you do to the engine? Sounds like it goes really well and some time when I may actually have some throw around cash, this sounds like the way to go.

I put in 836 pistons, 125/65 Megacycle cam, Kibblewhite valves/springs and new valve guides, porting and headwork by MRieck. Add pod filters and competition exhaust and awaaaayy we go

You could probably get several "project" bikes for the same $$$ as just one of these engines. I spread the cost over a year and it was well worth the wait.

News:

Author Topic: MRieck, you're a genius!! (Read 4624 times)

eldar