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Discussion Starter · #1 ·
I have a 2016 with 5,700mi on it. I have been riding it as a straight trackday bike for about 2 1/2yrs. Probably got 1500-2000 trackday miles out of here.
This weekend my motor completely took a ****. From what I can tell a valve guide came lose and tried to bust it's was out through the top of the rear valve cover. Cracked it open.

Option 1 rebuild it. Probably with someone who can make her more tolerable for trackday riding and not day to day street riding. I'm guessing this would be about $3k. But if you know from experience let me know.
Any recommendations on shops?

Option 2 buy used. eBay motor for around $1,400-$1,700. Drop it in and get back out there.

Option 3 part out the whole bike and get something else.

0530211058_HDR.jpg 0530211058a_HDR.jpg
 

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Can you just put a new (Ebay) head on it?

t_bare
 

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Discussion Starter · #4 ·
I did find a set of heads. For less than $300. Maybe that's option 4. But I would still need someone to rebuild it.
 

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Being you're a track guy like me you can appreciate some WSBK parts.
 

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Panigale L2 Wsbk Cylinder Heads Vertical & Horizontal 30123132F 30123122ES this is exactly what I need. Do you think this is a bolt on?
They will bolt on, but just know you are getting into custom built engine stuff. And those are bare heads, no valves or anything. I don't know if they are direct replacements or not. For example: The stroke on the 1299/1199 & the 959 are the same, only the bore is different (1299-116mm vs 959-100 mm) . But I don't know if the 959 crank has enough room to center the rods in the bore if I were to bolt on 1299 jugs. You really don't know if it's going to work until you get your hands on the parts and put the engine together.
Things to consider for your application are... will the larger valves make contact with anything? Maybe, maybe not, but if they do some custom machining will have to be done to make room for the larger valves. They may hit the top of the cylinder or the top of the piston for all I know. I personally would take the chance but that's just me, try shooting the guy an email asking if there would be any issues bolting them on a 959.
FYI specs:
T-body size: (959) 62mm, (1299) 67.5mm
Bore: (959) 100mm, (1299) 116mm
Stroke: Both 60.8mm
Intake valve: (959) 41.8mm, (1299) 46.8mm
Exhaust valve: (959) 34mm, (1299) 38.2mm
 

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Discussion Starter · #12 ·
They will bolt on, but just know you are getting into custom built engine stuff. And those are bare heads, no valves or anything. I don't know if they are direct replacements or not. For example: The stroke on the 1299/1199 & the 959 are the same, only the bore is different (1299-116mm vs 959-100 mm) . But I don't know if the 959 crank has enough room to center the rods in the bore if I were to bolt on 1299 jugs. You really don't know if it's going to work until you get your hands on the parts and put the engine together.
Things to consider for your application are... will the larger valves make contact with anything? Maybe, maybe not, but if they do some custom machining will have to be done to make room for the larger valves. They may hit the top of the cylinder or the top of the piston for all I know. I personally would take the chance but that's just me, try shooting the guy an email asking if there would be any issues bolting them on a 959.
FYI specs:
T-body size: (959) 62mm, (1299) 67.5mm
Bore: (959) 100mm, (1299) 116mm
Stroke: Both 60.8mm
Intake valve: (959) 41.8mm, (1299) 46.8mm
Exhaust valve: (959) 34mm, (1299) 38.2mm
Tons of great information here! Thank you. I guess my next question is: Who would you recommend rebuilding this motor?
 

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Tons of great information here! Thank you. I guess my next question is: Who would you recommend rebuilding this motor?
What I would do first is find out what diameter are the 1299 valves at and what the 959 is at. If they are the same you should have no problems. If the 1299 are more than the 100mm bore of the 959 then you know the valves may be too big depending on the angle they are set at. If they are at 98mm then you know they will open up in the bore. I would be concerned with the 959 bore not being big enough for the valves to open.
 

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Would I be the first person to even attempted this?
Not sure, you'd have to check around other forums. I've done research of numbers on various combos like a 899 crank with 1199 bore (57.2mm stroke x 112mm bore = 1127 cc) thinking a high revving de-stroked 1199 would be cool. But haven't gone beyond the research part yet.
 
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