Well hell!!! I just bought that damn harbor freight tester and tested my fresh 392 cub and got 60psi on both side. I was concerned until I seen this video.
Bought a cheap compression tester off Amazon and it doesn’t have that valve. I got a reading of about 80 PSI. Just got my Banshee a month ago and it fires right up every time and runs great. Definitely going to get a new tester lol. Thanks for the help
Nice video! I'm on your facebook page you have some good info. What's a good psi for stock motor stock head at about 800ft elevation? Also, what's the exceptable psi difference between each cylinders before you need a top end?? Thanks.
I don't understand I did a fresh rebuild and they're both showing 95 I'm compression they don't have the same compression tester as you have but they have one that's similar like it at harbor freight and I used it and it keeps showing 95 on each one
I recently bought a banshee that doesn't run but was a one owner since new. I bought the Bosch 7827 and I have 159 on one side and 59 on the other, can you tell me what that means
Gauge shouldn’t go down, if it does it’s a bad schrader valve in the gauge. Look where you screw it in to the head, up inside is a little tire valve basically. It’s leaking and need to be tightened or replaced.
@kevingalindo1 are 21cc domes ok for pump gas? In Australia our high octane pump fuel is 98RON and from memory in the US its 93MON. I've been told these are the same. I really want to have as much compression as possible for power but concerned 21cc's maybe to small and I will get detonation! How do you detect "pinging" or detonation?
Trevor Garcia 18cc makes 197psi---race gas 21 makes 155 sonit can be run on pump gas. If you have aggressive port work it will alter starting compression by the way.
South Texas Banshee okay thanks thats nice to know ive been using pump gas am i doing harm to the engine? i can switch to race once my tank is empty . and i have no port job at the moment.
Trevor Garcia Compression test it and see what your actually have. I've seen engines with 18cc domes making only 120psi. As rings wear and compression gets low they just change domes to compensate. If you are over 170 psi you need race gas.
J Williams Same part number? They have another there for 45 but it had long adapter tubes to reach in on engines like tritons. Here is the link to this tester. m.oreillyauto.com/h5/r/oap/site/c/detail/BOST/FIX7827.oap?pt=C0335
I need help my banshee won't start back up after running it for like 30 minutes after it's all warmed up I rode it hard at the dunes then it turned off and wouldn't start until a few days later
Angie Trujillo Hello, I would do a compression test on it to check the health of the cylinders then throw in a new set of plugs if it checks out good and see what happens. could be an electrical issue you might have to Chase down.
![How To Perform a Compression Test - [EASY]](http://i.ytimg.com/vi/3VmmL0YAO14/mqdefault.jpg)
man no wonder i was getting low psi with the harbor freight one .thanks for the info
Thank you Sir, still use your videos to confirm my limited knowledge on these machines. I hope you’re well!
I recently acquired a RZ350. Your videos have come in pretty handy for me. Thanks!
Well hell!!! I just bought that damn harbor freight tester and tested my fresh 392 cub and got 60psi on both side. I was concerned until I seen this video.
Great info on the gauges right from rip. Very very important info 👌
Bought a cheap compression tester off Amazon and it doesn’t have that valve. I got a reading of about 80 PSI. Just got my Banshee a month ago and it fires right up every time and runs great. Definitely going to get a new tester lol. Thanks for the help
I just bought my first Yamaha banshee should I be able to move the Kickstart with my hand
$32.00 after taxes at my O'Reilly for the same tester. Same part number and everything
/did the hose come worry it?cause on their website it only shows the gauge.thank u.
how much was the motor on ebay, im lookin to buy one as well. just didnt kno how much a healthy stock engine would cost roughly
Your the man I just had to change my draws before watching this video; 60 psi in my new 350 engine, thanks harbor frizzle for making me shit my pants
PUT IT ON SILENT YOU ROOKIE!!!!!!!
Hi my banshee have 120 is good ???
So what should compression be for a stock that has been noted .20 over? Thanks for the videos, they are of great help.
Nice video! I'm on your facebook page you have some good info. What's a good psi for stock motor stock head at about 800ft elevation? Also, what's the exceptable psi difference between each cylinders before you need a top end?? Thanks.
I don't understand I did a fresh rebuild and they're both showing 95 I'm compression they don't have the same compression tester as you have but they have one that's similar like it at harbor freight and I used it and it keeps showing 95 on each one
Do you keep the gas and kill switch on?
Is the switch supposed to be on or off when doing this?
Hello. What part number bosch compression tester is this?
At what psi should my stock banshee have, I’m in Los Angeles ca, 305’
Why do you have the gasoline key on reserve?
What brand is the gauge you used ?
I recently bought a banshee that doesn't run but was a one owner since new. I bought the Bosch 7827 and I have 159 on one side and 59 on the other, can you tell me what that means
David Arnold it means one cylinder is fucked. my guess is one cylinder ran lean
What is the maximum that it can give the gage? For Banshee
So when if u do the test and gauge goes down after it reaches highest point
Gauge shouldn’t go down, if it does it’s a bad schrader valve in the gauge. Look where you screw it in to the head, up inside is a little tire valve basically. It’s leaking and need to be tightened or replaced.
@kevingalindo1 are 21cc domes ok for pump gas?
In Australia our high octane pump fuel is 98RON and from memory in the US its 93MON.
I've been told these are the same.
I really want to have as much compression as possible for power but concerned 21cc's maybe to small and I will get detonation!
How do you detect "pinging" or detonation?
what would be the difference between a 21cc dome and the 18cc dome?
i have 18cc in mine right now
Trevor Garcia
18cc makes 197psi---race gas
21 makes 155 sonit can be run on pump gas. If you have aggressive port work it will alter starting compression by the way.
South Texas Banshee
okay thanks thats nice to know ive been using pump gas am i doing harm to the engine?
i can switch to race once my tank is empty .
and i have no port job at the moment.
Trevor Garcia
Compression test it and see what your actually have. I've seen engines with 18cc domes making only 120psi. As rings wear and compression gets low they just change domes to compensate. If you are over 170 psi you need race gas.
South Texas Banshee
okay ill test it out thanks for the info!
That Bosch tester is 45$ at my O'Reilly
J Williams
Same part number? They have another there for 45 but it had long adapter tubes to reach in on engines like tritons. Here is the link to this tester.
m.oreillyauto.com/h5/r/oap/site/c/detail/BOST/FIX7827.oap?pt=C0335
I need help my banshee won't start back up after running it for like 30 minutes after it's all warmed up I rode it hard at the dunes then it turned off and wouldn't start until a few days later
Angie Trujillo
Hello, I would do a compression test on it to check the health of the cylinders then throw in a new set of plugs if it checks out good and see what happens. could be an electrical issue you might have to Chase down.
South Texas Banshee 90psi and the plugs are wet
I wish I lived in your city I'd pay you to fix my 97 Banshee
I'll give you $800 and a 02 blaster that needs some work for that banshee :)
xboxdude764
Lol my son already has a blaster that just sits eve since he got the banshee.
South Texas Banshee so it's a deal :p
I'm getting like 98 on my banshee is that bad
is 110psi on both cylinders a bad compression?
MANUEL LOERA
It's low, 100 psi is rebuild time.
it's freshly repaired. it doesn't have more than 10hrs. Any Wiseco kit that you recommend? I wanna do it myself this time......
MANUEL LOERA was it bored on the last rebuild? Stock head?
every thing std with stock heads
MANUEL LOERA
Stock OEM cyls or new aftermarket?
Your too rough