Question about 1987 Yamaha SDR

1 Answer

I have a relatively new Bravo snowmobile with less than 500km on it. To date it has blown 2 sets of exhaust springs. (springs that hold the exhaust to the cylinder head) Just recently the the weld around the exhaust ring that fits over the cylinder head broke off leaving me stranded. Unfortunately the machine is no longer on warrenty and the Yamaha mechanic I talked to has never heard of this and has no idea what is causing the problem. I can't rely on this machine until I solve this problem. Any ideas

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 101 Answers

Hi ....... Sounds like a stress fracture, something is moving relative to another thing which is UNABLE to move. Push & pull everything around the effected area then check ALL the mountings. If nothing is obvious lossen all fixings and re-torque to manufacturers recommendations. If you have a workshop manual look at all the engine mountings and see if any are rubber (or similar) types. Let us know how you get on.

Posted on Jan 06, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Backfire on deacceleration


Get the fueling set up on a rolling road. Honda set the fuelling to suit the Emissions and the Exhaust they fitted.An after market exhaust will usually have less backpressure and need a set up. When you say backfire, do you mean a great big bang or just a little popping sound from the exhaust? If it is the latter, it isn't a massive problem but a set up will cure it. A Big Bang could be a cause for concern as it means the ignition is taking place when the Exhaust valve is open and firing in the exhaust itself. This will give a drop in performance and may cause the engine and exhaust to fail.

Apr 06, 2013 | 2005 Honda VTX 1300 R

1 Answer

Pulsar DTS-FI misfiring -- 6000 KMs only 2008 February model. It misfires while downshifting -- most of the times it misfires around 4000 or 5000 RPM. with pillion / double seat -- it happens less so but...


Hi, Milind and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in the fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor or intake seals.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, O2, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust valve.
For more information about your issue, please visit the websites below. Good luck and have a nice day.CY6 Running Rough
How to test and repair the charging system on scooter
Service Manual Bajaj Pulsar 220
http://www.tunasmegaspirit.com/files/catalogue/Pulsar-220-Spareparts-Catalogue.pdf https://www.facebook.com/media/set/?set=a.504541669580494.120586.177568422277822&type=3

Nov 12, 2012 | 2008 Bajaj Pulsar 220 DTSFI

1 Answer

How to set up a new clutch


There is no setting the tension on the springs if the clutch has 4-6 springs as most do. The bolts that hold the clutch springs in tighten all the way down until they are snug (I would say about 100 inch-lbs max for each bolt torque.

Jul 18, 2012 | Honda Motorcycles

1 Answer

Just bought a new 2008 Vstar 1300. Less than 500km. Took it out for a ride and felt it was not running right. No power. Returned home, only to find the exaughst pipe glowing red. Any idea what the...


Hi,
Seems you have a blocked exhaust pipe, sure there is some exhaust coming out, but some chamber have small exhaust gas passage going through! Check your engine temp and carb mixture too!
Hope that helps u out!

Jun 12, 2011 | 2008 Yamaha V Star 1300

1 Answer

I have a 96 sts the exult gasket (inner) where the spring is connected to is bad and cannot get new part, i have the new outter rubber gasket Can i assemble back together without the spring? what is the...


The parts are available. Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part and/or the notation "Not Available" is in the description, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx

The springs help to hold the exhaust firmly to the cylinder and prevent any rattling noises.

Nov 18, 2009 | 2004 Yamaha YZ 125

1 Answer

When i kick my 85 yamaha yz 125 gas and oil come dripping out of my engine where the exhaust and engine meet ? Helpppp


Sounds like you have blown the exhaust gasket. Not a difficult repair .. just undo the exhaust manifold bolts and remove the exhaust. Purchase a new gasket and reassemble with the correct torque settings.


Sep 26, 2009 | 2003 Yamaha YZ 125

1 Answer

Yamaha Bravo snowmobile keeps blowing exhaust springs


sounds like the stock exhaust is the fault.  Possibly the shape is out of line and putting extra stress in the springs.  Any chance you can get another stock or even a after market exhaust to try for a while to see if it still blows the springs(I assume you mean the springs are breaking) in the past time frame? 

Jan 05, 2009 | 1987 Yamaha SDR

1 Answer

Questions 500km service.


in both manuals is 4 to 6mm (1/4). I read this to mean total play NOT 1/4' up +1/4 down for a total of 1/2' play correct? 2 - On the oil filter between the cap nut and the oil filter cover was a copper washer in the oil change kit was an o - ring. The o-ring seems too large it squeezes out from beneath the cap nut using only enough tension to compress the oil filter spring. I reused the copper washer. ( Note: the copper washer for the drain plug was also a little oversized, the large o-ring for the cover itself seems fine. ) Did I order the wrong kit? On the order form it states for Original Bullets made 11/98 & on. I own an '08 cast iron engined Classic. 3 - Can the small copper washers be had anywhere.? Other than these minor items the 500 km service is progressing well !!!!!,Questions 500km service.,,,

Nov 10, 2008 | 2001 Enfield Bullet 350

Not finding what you are looking for?
1987 Yamaha SDR Logo

176 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1128 Answers

D. E. Hev

Level 3 Expert

1059 Answers

mikeuk

Level 2 Expert

61 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...