Road Star Forum
Welcome, Guest
Please Login or Register.    Lost Password?
Road Star Forum General Bike Talk
compression test low (1 viewing) (1) Guest
Go to bottom Post Reply Favoured: 0
TOPIC: compression test low
#224181
sundance (User)
Junior Boarder
Posts: 142
graphgraph
User Offline Click here to see the profile of this user
Gender: Male Location: Burlington NC Birthdate: 1940-11-29
compression test low 2 Years, 5 Months ago  
I have a midnight star 2004 1700 with 60000 mi. I just adjusted the valves and while doing so bought a compression tester from auto zone and checked the compression. I'm not sure how accurate the tester is. With the engine hot psi is 120 in the front cylinder and 118 in the rear. The standard is 175 and minimium is 145 psi. I am not burning any oil and have no compalint with the performance of the motorcycle. Since this is quite a bit below specs I'm not sure what the next step should be?
I have thought about replacing the rings this winter and have looked at the test articles for tearing down the top end of the engine, I don't see that to be a problem for me. I have also thought about installing high compression pistons while I have the engine apart. If I do this is it necessary to replace the ignition system or have any thing done to the valves?
I guess to sum it up with two qustions:
How concerned should I be about the low psi?
If I go with high compression pistons what all else should be done?

Sundance
 
Logged Logged  
 

  The administrator has disabled public write access.
      Topics Author Date
    thread link
compression test low
sundance 2009/09/09 11:03
    thread link
thread linkthread link Re:compression test low
jvcexc 2009/09/09 11:13
    thread link
thread linkthread link Re:compression test low
PapaTom 2009/09/09 11:18
    thread link
thread linkthread link Re:compression test low
stanag 2009/09/09 11:49
    thread link
thread linkthread linkthread link Re:compression test low
DocShadow 2009/09/09 12:29
    thread link
thread linkthread linkthread linkthread link Re:compression test low
jbiv 2009/09/09 12:43
    thread link
thread linkthread linkthread linkthread linkthread link Re:compression test low
sundance 2009/09/09 14:21
    thread link
thread linkthread linkthread linkthread linkthread linkthread link Re:compression test low
Clifford 2009/09/09 17:49
    thread link
thread linkthread linkthread linkthread linkthread linkthread link Re:compression test low
DocShadow 2009/09/09 18:39
    thread link
thread linkthread linkthread linkthread linkthread linkthread linkthread link Re:compression test low
vwtech0 2009/09/09 19:19
    thread link
thread linkthread linkthread linkthread linkthread linkthread linkthread linkthread link Re:compression test low
dschock 2011/08/28 17:24
    thread link
thread linkthread link Re:compression test low
BlueRider 2009/09/09 12:43
    thread link
thread linkthread link Re:compression test low
BigBoyinMS 2009/09/09 17:20
    thread link
thread linkthread link Re:compression test low
jbiv 2009/09/09 18:04
    thread link
thread linkthread link Re:compression test low
sundance 2009/09/09 21:11
    thread link
thread linkthread link Re:compression test low
scottw 2011/08/28 20:44
    thread link
thread linkthread link Re:compression test low
USAFRETIRED 2011/08/28 20:57
    thread link
thread linkthread linkthread link Re:compression test low
scottw 2011/08/28 21:05
    thread link
thread linkthread link Re:compression test low
gfolkert 2011/08/28 21:22
    thread link
thread linkthread linkthread link Re:compression test low
Curt 2011/08/28 23:34
Go to top Post Reply
Powered by FireBoardget the latest posts directly to your desktop
 
...................................................................... ...................................................................... ...................................................................... ...................................................................... ...................................................................... ...................................................................... ...................................................................... ...................................................................... ...................................................................... -->
New Forum Posts
In: Maintenance, 2/10/2012, 9 replies
Subject: Lithium Soap?
About_Time: A lot of the lubrication points shown in the service manual call for the application of lithium soap type lubricant. Specifically, I am about to repack my steering neck bearings. What do the members ...
Latest reply, 2/11/2012
HEAVY METAL NOISE 101: jp-1 is a good grease,they make hi-temp or multi-purpose grease,It is very water proof and holds up well ...Lithium Soap?
10 posts, last by:
HEAVY METAL NOISE 101
In: Bike Talk, 2/4/2012, 56 replies
Subject: Is RoadStar S too Big For Me? Female Rider Asking
azalearider: Hi, New to the site and this is my first thread. Looking for some advice. I'm a female rider - about 130 pounds and 5'5". My first purchase was 400cc bike - which I rode for 7 years. Then moved on ...
Latest reply, 2/11/2012
HEAVY METAL NOISE 101: :welcome:I just bought a 03' 1600 in oct. and my wife and I love it.If you know any body who has one ...Is RoadStar S too Big For Me? Female Rider Asking
57 posts, last by:
HEAVY METAL NOISE 101
In: Electrical/Electronics, 2/11/2012, 1 reply
Subject: Extending wires for inside the bars...
goodnamesaretook: Anyone out there have any idea how much length should need to be added to the stock wiring to be able to run the wires inside a set of 16" apes with stock risers. I've got the bars on order and would ...
Latest reply, 2/11/2012
smokescreens: well, i know you can use the stock wiring for 10" apes and some narrow 12" without adding wire so add ...Extending wires for inside the bars...
2 posts, last by:
smokescreens
In: Bike Talk, 2/11/2012
Subject: Greate Website
NorThai: Have a look... :)
Greate Website
new topic by:
NorThai
In: Bolt Ons, 2/10/2012, 6 replies
Subject: Removing passing lights
azbto: 1700 midnight star with yamaha passing lamps, i want to clean up the front a bit and am contemplating removing the passing light bar but see the front of the headlight is supported by the bar. Does anybody ...
Latest reply, 2/10/2012
cwat320: DON'T CUT UP PASSING LAMPS! SOMEONE (me) WILL BUY THEM AND GIVE YOU THEIRS!!! ;)Removing passing lights
7 posts, last by:
cwat320
In: Bike Talk, 2/10/2012, 22 replies
Subject: this road star is to cool!!!
smokescreens: i ran accross this on photobucket and man is this bike cool to me. look at the rear brakes on this thing and the shift linkage. and it has a warrior motor in it:woohoo: forgive the first pic. http://s995.photobucket.com/albums/af76/Yzftx7500/roadstar%20custom/?albumview=slideshow
Latest reply, 2/10/2012
Keeb: So........is that supposed to be a nitrous bottle for a shifter linkage? Very different, Idunno that ...this road star is to cool!!!
23 posts, last by:
Keeb
In: Bike Talk, 2/10/2012, 5 replies
Subject: Fairing and tour trunk ideas
Paintertom40: The wife gave me the go ahead to get fairing and tour trunk.so let me no what you have and how you like it. thanks Tom
Latest reply, 2/10/2012
dthorny: I have the Tsukayu GPS/radio fairing and bought the tour pack at eBay, it's similar to the Mutazu trunk. ...Fairing and tour trunk ideas
6 posts, last by:
dthorny
In: Bike Talk, 2/10/2012, 8 replies
Subject: Waht Tires do you ride???
ear3:
Latest reply, 2/10/2012
brown91redcam: I replaced my Dunlops with the Metz 880s front and rear and love them so farWaht Tires do you ride???
9 posts, last by:
brown91redcam
In: Miscellaneous, 2/10/2012, 6 replies
Subject: Custom back patch...
Unab8d_Ly4m: Was wondering if anyone knew where I could get a back patch done for a decent price. I would like to get my signature picture without the LSU or Saints logos, but with the colors reversed.
Latest reply, 2/10/2012
saab9k: This lady can do it, have seen her work http://engravingsetc.com/Custom back patch...
7 posts, last by:
saab9k
In: Miscellaneous, 2/9/2012, 6 replies
Subject: Metric Magic
Plumbwader: Anyone have a good email addy for metric magic. I keep getting mailer daemons. Im trying to get a price on some stainless cables for my new apes? B) ill take suggestions about other places to contact ...
Latest reply, 2/10/2012
deadweight: Yes sir, Tim is fast and has good prices too.:)Metric Magic
7 posts, last by:
deadweight
In: Bolt Ons, 2/9/2012, 8 replies
Subject: Front wheel ring
signal20k9: Anybody have one of these laying around that they dont need? This one is from a Stratoliner, but looks like one from a V-Star 1100 will work as well by checking some part numbers.
Latest reply, 2/10/2012
signal20k9: Eddie there is a Write up on the Raider rear wheel swap on the board here. Looks like it was pretty extensive, ...Front wheel ring
9 posts, last by:
signal20k9
In: Miscellaneous, 2/10/2012, 2 replies
Subject: selling my 07 cast wheels...help
ajbonner: want to make money for a fairing. both have tires, only front good (oem bridgestone). 7k miles. rear doesn't have rotor. how much should i expect to get for them? Anyone in the market?
Latest reply, 2/10/2012
twobig4x4s: im looking for some mag wheels selling my 07 cast wheels...help
3 posts, last by:
twobig4x4s
In: Maintenance, 2/10/2012, 7 replies
Subject: Throtle return rate
espressodude: Hello All First sorry if this is a stupid question, I did do a search and couldn't find anything relative. When I used to ride a life time ago my throttle "sprang" back to the starting position. ...
Latest reply, 2/10/2012
jd750ace: Hey Roadkill, Don't let Ralph Nader see you only have a pull cable. That second cable is so you can ...Throtle return rate
8 posts, last by:
jd750ace
In: Electrical/Electronics, 2/10/2012, 3 replies
Subject: Led turn signals
fetasigma: I have an led taillight and was thinking of putting in led turn signals as well. Wich is better putting in load resistors or just changing out the flasher relay for one that is led compatible. Also is ...
Latest reply, 2/10/2012
fetasigma: I didnt know they self canceled anyway lolLed turn signals
4 posts, last by:
fetasigma
In: Introductions, 2/9/2012, 30 replies
Subject: Hello from Virginia (NOVA)
Azul Diablo: Im new to the Road Star Clinic but not new to riding. Ive been living on 2 wheels since 2005. My first bike was a Honda VTX 1300C it was a very good bike until I test rode a 2005 Yamaha Road Star Midnight ...
Latest reply, 2/10/2012
JGR: :welcome: from MI. and thanks for your :tank: This sit is awesome!Hello from Virginia (NOVA)
31 posts, last by:
JGR
In: Bike Talk, 2/10/2012, 14 replies
Subject: front springs
Cody: Well i ordered the progessive.springs for the front . So i figured id get started on makeing the spacers. Can anyone tell me what size they need to be thickness amd how long thanks guys
Latest reply, 2/10/2012
JGR: www.midnight-lightning.com/FrontLowering.html This is what i did and it was basically free and my bike ...front springs
15 posts, last by:
JGR
In: Maintenance, 2/10/2012, 14 replies
Subject: Ignition switch and battery ????
BEAMS123: So I took my bike to this harley guy that knows everything about bikes.....told him over the phone how to get the seat off yet after 1.5 hrs still no luck. So I drove out to his shop and took it off for ...
Latest reply, 2/10/2012
Erbman02: thats it, stator and rec/reg from an 05 or newer, other than the battery is the only other thing in what ...Ignition switch and battery ????
15 posts, last by:
Erbman02
In: Non Motorcycle Topics, 2/10/2012, 4 replies
Subject: Got my new boots!
chrisxv1600al: Got my new boots! Milwaukee "Mechanics". $83.99 after Gold Club membership discount from J & P Cycles. Also ...
Latest reply, 2/10/2012
OBMF: Nice boots. I'm almost afraid to admit it, but I wear a pair of Harley Davidson boots that I bought for ...Got my new boots!
5 posts, last by:
OBMF
In: Introductions, 2/10/2012, 28 replies
Subject: hello all
DON1989: I bought me a 2008 road star silverado 1700 on new years day road it home about 18 miles when it was about 35 outside and still loved it!!! also pretty excited about finding this site
Latest reply, 2/10/2012
Paintertom40: hello from Ohio hello all
29 posts, last by:
Paintertom40
In: Body/Frame, 2/8/2012, 18 replies
Subject: shifter mod
dvblair: Has anyone cut off the heel portion of the shifter? I never use it and would like to have the extra room. I would like to remove it but it looks like you would need a spacer on the shaft and I'm not sure ...
Latest reply, 2/10/2012
Tug: Yup I did the same thing. It was my first mod actuallyshifter mod
19 posts, last by:
Tug
In: Miscellaneous, 2/10/2012, 2 replies
Subject: Intake Manifold
SaltyJack: :( I've been having thoughts of having a intake manifold modified and I saw one on ebay for $35, used. I enlarged the picture and it looked severely cracked to me so I asked "the" question. Why put something ...
Latest reply, 2/10/2012
MS1700: I have one of Curts and of about 5, it was the only one that did not leak and worked like a charm. Practice ...Intake Manifold
3 posts, last by:
MS1700
In: Bolt Ons, 2/9/2012, 7 replies
Subject: WTB Royal Star Hard Saddlebag mounting brackets
ajbonner: Let me know if you have the above. Dont want the trim brackets, just the mounting brackets. Thanks
Latest reply, 2/10/2012
ajbonner: thanks scottoWTB Royal Star Hard Saddlebag mounting brackets
8 posts, last by:
ajbonner
In: Jetting, 2/9/2012, 10 replies
Subject: RuNning rich
Plumbwader: What r signs of running rich without reading the plugs?
Latest reply, 2/10/2012
Curt: FI bikes are controlled by the ECU and the 02 sensors so they will be richer than a carb bike. Even a ...RuNning rich
11 posts, last by:
Curt
In: Bolt Ons, 2/10/2012, 2 replies
Subject: Floorboard Extensions
Roadstar_Rob: I'm looking to extend my driver boards out away from the bike. All of the extensions I've come across are for moving them forward. Anyone familiar with extension mod to set them out wider? Thanks, Rob
Latest reply, 2/10/2012
chrisxv1600al: Rob... I did this to mine and used a couple pieces of smaller square tubing. It was either 1" or 1 1/4" ...Floorboard Extensions
3 posts, last by:
chrisxv1600al
In: Introductions, 2/9/2012, 30 replies
Subject: Hello Ya'll
ShadowsDad: Hey names Jeremiah, Been riding 5 years now, my first bike was a 06'shadow Aero 750. Loved that bike.after having ridden my father-in-laws Roadstar I realized I needed a bigger bike.I liked the way it ...
Latest reply, 2/10/2012
huskerbob: :welcome: Hello Ya'll
31 posts, last by:
huskerbob
In: Introductions, 2/5/2012, 30 replies
Subject: New to RSC
ear3: Need, Front Forks, Light Bar, Windshield & Supports, Rear Master Cylinder THX
Latest reply, 2/10/2012
ear3: Thanks guys, can I get all your favorite tires you like to ride, especially for long ridesNew to RSC
31 posts, last by:
ear3
In: Bolt Ons, 2/8/2012, 12 replies
Subject: Another Grip Question
azbto: Ok, just got a new set of bars for my '05 1700, they are heritage bars... when I took them off discovered the oem bars have end weights that I cant reuse with the new bars. So I am in the market for new ...
Latest reply, 2/10/2012
cartersta: mine dont have the weights in them, these are heratige bars!!with iso gripsAnother Grip Question
13 posts, last by:
cartersta
In: Bike Talk, 2/8/2012, 14 replies
Subject: Is this a fair price?
azalearider: 2009 Road Star S 0 Miles - Left Over that hasn't sold. $9100 Thanks!
Latest reply, 2/10/2012
BubbaKahuna: We have one at my work, brand new 2009 Roadstar in Candy Red for $8895 out the door if sold outside Wisconsin. ...Is this a fair price?
15 posts, last by:
BubbaKahuna
In: Electrical/Electronics, 2/1/2012, 9 replies
Subject: starter problems
Papa Bear: with a new battery installed, i get all lights and electronics functioning when I push the starter button, but only a click. No starter rotation at all. Prognosis please? Papa Bear
Latest reply, 2/10/2012
Papa Bear: :) Just reporting back. After checking all of the recommendatoins(thank you all)it turns out that the ...starter problems
10 posts, last by:
Papa Bear
In: Miscellaneous, 2/9/2012, 6 replies
Subject: cool sidecars
roadiemort: http://sn116w.snt116.mail.live.com/default.aspx#n=1355430984&fid=1&fav=1&mid=6819fbbb-5335-11e1-9077-00215ad80c0e&fv=1
Latest reply, 2/10/2012
Tug: now those are cool B) B)cool sidecars
7 posts, last by:
Tug




  Privacy Policy | Terms of Service | Spam Policy | Report Abuse

The Road Star Clinic is a collaborative community of riders who archive and publish user contributed technical data about Yamaha Road Star motorcycles.

We also sponsor the creation and support of other community websites similar to our own. Inquiries about availability of a website for your community can be submitted to us via any "Contact Us" option on the Clinic.

Copyright 2003-2007 Road Star Clinic and its respective authors. Road Star Clinic is sponsored by the folks at MLSHomeQuest.com.