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Post by phatboy on Jun 19, 2015 0:23:37 GMT -5
I'd double check your valve timing, if you are off by a tooth it could have that effect
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Post by ricardoguitars on Jun 19, 2015 10:48:46 GMT -5
I'm not sure what kind of airbox/filter setup you have, but some setups you can take the airbox cover off to get more air, and see if it runs better that way. No airbox, I'm using a uni-filter. I got the compression gauge already, I'll do all the tests this weekend, these are the tests that you guys have suggested so far, I'm going to try them all: - Tune the carb with a smaller jet - Try with another CDI and coil - Tune the CVT (I have the stock rollers, 12g sliders and 10g sliders, the stock compression spring and a red spring, 2K I believe). - Check the compression - Check the piston rings gap - Check the rocker position - Check the timing alignment I believe that should take care of the issue and my weekend  I'll let you know how it goes, if I missed a test, let me know  |
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Post by ricardoguitars on Jun 19, 2015 23:04:35 GMT -5
I'd double check your valve timing, if you are off by a tooth it could have that effect DING, DING, DING!!! We have a winner!!!  It was wayyy off, almost half a turn, don't know how that happened, I'm sure I did it right the first time, I adjusted the timing again and now it turned into a slingshot!!  The acceleration on this lawnmower is crazy! I just made a test run on the highway and had to stop it at 8500rpms, the speedo topped and the thing was still accelerating  I didn't want to take it further, I don't want to blow the engine. This is how it looks now:    Thank you guys for all your help, I learned a lot during this process |
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Post by geh3333 on Jun 19, 2015 23:31:02 GMT -5
You need heavier variator weights so you don't hit those hghi rpms. You will also keep the top end speed , maybe even pick up more . how high is the belt climbing in the variator?
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Post by ricardoguitars on Jun 20, 2015 0:23:20 GMT -5
You need heavier variator weights so you don't hit those hghi rpms. You will also keep the top end speed , maybe even pick up more . how high is the belt climbing in the variator? I haven't mess with the CVT yet, that's what I'm gonna do next. :thumbup: |
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Post by pistonguy on Jun 20, 2015 18:16:27 GMT -5
Glad you got it sorted out.
However Im not very happy with the Compression reading
Its plenty enough to start, run ok, but could/should be better.
Should be more by 10 points or more.
What kind of Oil are you using?
Was the compression checked with engine cold or at operating temp?
I do realize you have short time on it so far so I hope it gets better once the rings are seated.
It won't take long to accomplish this.
keep a record of your reading and do it again with some more miles on her.
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Post by ricardoguitars on Jun 20, 2015 20:13:36 GMT -5
Glad you got it sorted out. However Im not very happy with the Compression reading Its plenty enough to start, run ok, but could/should be better. Should be more by 10 points or more. What kind of Oil are you using? Was the compression checked with engine cold or at operating temp? I do realize you have short time on it so far so I hope it gets better once the rings are seated. It won't take long to accomplish this. keep a record of your reading and do it again with some more miles on her. I did the reading with the engine cold, I'm using Bel Ray 10W50 synthetic oil. |
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Post by pistonguy on Jun 20, 2015 21:02:58 GMT -5
Thank you for your Honesty
This is the Best Policy to Help, Live, Learn and Move Forward.
That being said you should Not have used a Synthetic for Break In of the New BBK.
A Synthetic is Far Too Slippery for Properly Seating in the New Rings to the New Bore. (Iron Bore).
Most likely won't get any better. Whats Done is Done.
Still change to a Dino oil for 3 to 500 miles depending on your riding conditions.
Most Likely it won't get any better tho.
This BBK has a Very Fine Finish Using a Modern Plateau Hone Finish of 400-600 grit.
Nice .039/1mm Stainless Rings.
There are some Very Good Break In Oils that are well worth the money for ultimate Ring Seal and longevity.
I know its running good but could be Better or Allot Better with little more to no cost.
The Five P's
Prior Planning Prevents Poor Performance.
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Post by ricardoguitars on Jun 20, 2015 22:00:27 GMT -5
Thank you for your Honesty This is the Best Policy to Help, Live, Learn and Move Forward. That being said you should Not have used a Synthetic for Break In of the New BBK. A Synthetic is Far Too Slippery for Properly Seating in the New Rings to the New Bore. (Iron Bore). Most likely won't get any better. Whats Done is Done. Still change to a Dino oil for 3 to 500 miles depending on your riding conditions. Most Likely it won't get any better tho. This BBK has a Very Fine Finish Using a Modern Plateau Hone Finish of 400-600 grit. Nice .039/1mm Stainless Rings. There are some Very Good Break In Oils that are well worth the money for ultimate Ring Seal and longevity. I know its running good but could be Better or Allot Better with little more to no cost. The Five P's Prior Planning Prevents Poor Performance. Didn't know synthetic oil wasn't good for break in  , I did the first oil change with mineral oil that I had left, then put the synthetic after almost 100km. Should I keep using synthetic or mineral? |
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Post by pistonguy on Jun 21, 2015 20:26:27 GMT -5
How many miles on the new to End?
Yes stick with a Dino Oil for a few hundred miles.
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Post by ricardoguitars on Jun 21, 2015 21:43:51 GMT -5
How many miles on the new to End? Yes stick with a Dino Oil for a few hundred miles. Almost 200 miles now, the whether got cold, I can feel it performs better, not sure if is the whether or the engine braking in, perhaps both. I will take another compression reading and see what it shows. |
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Post by geh3333 on Jun 21, 2015 22:57:11 GMT -5
How many miles on the new to End? Yes stick with a Dino Oil for a few hundred miles. Almost 200 miles now, the whether got cold, I can feel it performs better, not sure if is the whether or the engine braking in, perhaps both. I will take another compression reading and see what it shows. I used regular 10w40 Pennzoil for break in . then switched to royal purple within the first 100 miles. The rings should seat within the first 20 miles. I have nearly 20k on my setup and still going strong. Its always good to be safe , so waiting 500 miles till you switch to a synthetic is not a bad idea. |
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Post by ricardoguitars on Jun 22, 2015 12:35:24 GMT -5
Almost 200 miles now, the whether got cold, I can feel it performs better, not sure if is the whether or the engine braking in, perhaps both. I will take another compression reading and see what it shows. I used regular 10w40 Pennzoil for break in . then switched to royal purple within the first 100 miles. The rings should seat within the first 20 miles. I have nearly 20k on my setup and still going strong. Its always good to be safe , so waiting 500 miles till you switch to a synthetic is not a bad idea. I did the first 100 miles (more or less) with mineral oil, then I added Synthetic. |
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