Please help....about to give up and part this out.

[afraz1er]

Ive pretty much replaced just about everything with new. I'm getting tired of putting money into this ski, beginning to think im just not destined to own a Yamaha. Maybe I should go back to kawi.

I guess a 17 second video is too large to upload so the link contains a video I just took . Seems like it's hitting the rev limter way to early. Could it be fuel related or something electrical, maybe in the cdi?

httpsfacebook.com/groups/528130763966836?view=permalink&id=1377541595692411

62t crank, stator, flywheel
64v cases
61x cylinder
65u Pistons, 84mm, oem# 65U-11631-01-89

Ski has:
✓10/17 Impeller
✓61x cylinders, ported by Tim Tynan
✓64v ported cases
✓65u Pistons, 84mm bore
✓ada racing 45* pissers
✓bored reduction nozzle
✓Deutsch connector on ebox
✓ pfm industries lightened flywheel
✓protec c2 girdled head, 38cc
✓pro/k flame arrestor
✓protec stainless b body pipe
✓Pro/k flame arrester
✓6 pin Deutsch connector
✓Blowsion 0* bars
✓single carb intake adapter
✓500 gph bilge
✓red bow and stearn eye
✓diamond cut turf
✓jetworks fcv
✓garden hose adapter
✓ODI grips
✓hand Pole limit rope
✓650sx intake manifold
✓worx intake grate
✓ada throttle wheel

Sent from my XT1650 using Tapatalk

 

[afraz1er]

120 low
150 high
2.0 n/s
2 out low
2 out high

Sent from my XT1650 using Tapatalk

 

[afraz1er]

Mag side - 160psi
Pto side - 157psi

Sent from my XT1650 using Tapatalk

 

[augustaf]

Your single carb is way to low on the pilot (low) jet. High speed jet a bit low too.

 

[afraz1er]

Any suggestions as to what size should be in there ?

Sent from my XT1650 using Tapatalk

 

[mbrick]

I don't see it in your list, what carb do you have ?

 

[afraz1er]

Single 44 at the moment.

Saving up for duals.

Sent from my XT1650 using Tapatalk

 

[mbrick]

May help to post your vid somewhere more accessible like Youtube or Vimeo.

Try reading through here? http://www.x-h2o.com/index.php?thre...rjet-and-blaster-1.19403/page-13#post-1767873

I see some single 44 in line with yours and some higher. This is not me endorsing the numbers below.

Brand = mikuni
Model = sbn
Size = 44
Quantity = 1
Main Jet = 157.5
Pilot Jet = 127.5
Needle/Seat = 2.0
Spring = 95 g with 25 psi pop off

Brand =-------Mikuni
Model =-------SBN
Size =---------44
Quantity =-----1
Main Jet =-----145
Pilot Jet =-----120
Needle/Seat =- 2.0
Spring =------ 65 gram
Pilot screw = --1.25 turns
Main Screw =--2.25 turns​

 

[LBS4]

Possible simple electrical issue? Just helped a guy thru a faulty temp sensor with similar symptoms, was putting ski into limp mode intermittently.
I'm sorry, no thoughts on jetting for you, I'm OE 38's.
LB

 

[afraz1er]

Sent from my XT1650 using Tapatalk

 

[afraz1er]

The only thing electrical I haven't replaced with new is the voltage regulator and cdi.

Are the CDI's specific to a T or X stator? Or can either cdi be used with either stator ?

Sent from my XT1650 using Tapatalk

 

[Robbie8984]

CDI units from either will work fine.

Its the stators and flywheels that are different.

 

[Freakie]

You can spray some fuel mix into the air filter intake as you rev the throttle. If it screams to the rev limiter every time you hit the throttle ..not elect but carbs more likely

 

[Quinc]

Stock exhaust?

Do you have the correct flywheel/stator combo?

Before I rebuilt my blaster it would hit the rev limiter right away on the trailer, but would run great in the water.

 

[afraz1er]

Flywheel and stator are correct combo. I bought a stator not knowing the difference and it didn't fit under the original flywheel, bought a t flywheel and it fit.

Sent from my XT1650 using Tapatalk

 

[Quinc]

Send your CDI to OCD and have him remove the limiter. Problem solved. What exhaust setup do you have?

 

[37]

Seems like it's hitting the rev limter way to early. Could it be fuel related or something electrical, maybe in the cdi?

From the video it sounds like it's cutting out around the 3500 RPM mark where the temp sensor would kick in. Perhaps the temp sensor lead from your CDI is grounded. Do you have an electronic tach to check the exact RPM value where it cuts out?

 

[afraz1er]

Sent from my XT1650 using Tapatalk

 

[afraz1er]

From the video it sounds like it's cutting out around the 3500 RPM mark where the temp sensor would kick in. Perhaps the temp sensor lead from your CDI is grounded. Do you have an electronic tach to check the exact RPM value where it cuts out?

I don't have a tach, but tonight after work I'll check the schematic on the ground issue.

There's no temp sensor present, just the wires.

Sent from my XT1650 using Tapatalk

 

[LBS4]

I'm certain not your issue but I would definitely get a vacuum cap or 1/4" plug for your unused 'on' fuel line - that "doubled over in a zip tie" system looks like a problem waiting to happen.
JMO & I mean no offense, your clean & sano engine bay deserves much better!
And post up what you find in the disconnected temp sensor wires, maybe grounding out as mentioned above.
LB