Question about 2005 Honda CB 1300

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Vibration when riding, sonds like its coming from the front of the engine but not sure, can you help

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  • Honda Master
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Check the mounting bolts of the engine to the frame, it may be lose.

Posted on May 24, 2009

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Front end vibration on my Yamaha Cygnus XNXC 125


Hi, Martin and the usual suspects are:
1. Wheels and or tires worn or damaged.
2. Engine/transmission/vehicle not aligned properly.
3. Primary chain is badly worn or links too tight as a result of insufficient lubrication or misalignment.
4. Engine to transmission mounting bolts loose.
5. Upper engine mounting bracket loose.
6. Ignition timing incorrect due to a poorly tuned engine.
7. Internal engine problem flywheels have shifted.
8. Broken frame.
9. Stabilizer links worn or loose.
10. Rubber mounts loose or worn.
11. Rear fork pivot shaft nuts loose.
12. Front engine mounting bolts loose.
13. Worn out or broken universal joint on shaft drive models.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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The truck 85 f150 and the fly wheel keep breakin


When you start it does it grind sond like not the right starter or ring geaf

Mar 26, 2015 | 1985 Ford F150

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I changed tire size from low pro to 11/22.5 now have powertrain vibration on a 2010 peterbilt 388 with front air ride


You need to adjust the ride height on both drive axles to specs or you will get a vibration.

Oct 20, 2014 | Cars & Trucks

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How to stop vibration on 1969 bonneville


I am guessing if you are riding a '69 Bonneville, you really are interested in what people have to say about the bike and aren't expecting a one line answer that cures all your vibration concerns.

The '69 is still English (right foot) shift, and has the original frame that the Triumph purists love. You probably know that - unless you have never ridden the bike. Most of us who have a Triumph work on them, and I am guessing you do as well, unless you recently inherited or bought the bike on a whim because of its classic look and name.

There are various vibration issues you have to deal with on a Triumph Bonneville. Road vibration, running gear vibration, and engine vibration.

Quick rundown - Run tires at proper pressure. Make sure your wheels are both round and true, and have them re-spoked or replaced if necessary. You would be surprised how a pot-hole can distort a wheel. Check chain and sprockets for wear, replace if necessary. Use proper lubrication. There are modern o-ring chains that are cleaner than original. Make sure your chain is not chafing against the guard. A surprising source of vibration on the Bonnie is the primary chain between engine and transmission. Make sure it is in good condition and tightened to proper tension. If you have to replace the primary chain consider a kevlar toothed belt replacement. They are quieter and smoother. Make sure brakes are true. On the '69 you *might* want to consider upgrading the front brake to a disc system. It will serve you better than the original double leading shoe. Make sure front forks are properly filled to proper level. You can go with aftermarket progressive fork springs, if you want to change suspension for more aggressive riding or higher loads. Also, you can replace your Girling rear shocks with aftermarket. I have had much better ride and handling with aftermarket products. In general, the Brit riders of the 50s and 60s were somewhat smaller guys than we are now. You *might* be at a fighting weight of 138lb, but I am guessing not. On later years, handle bars were rubber mounted, and ends of the bars had lead weights to dampen vibration. Again, you might want to consider that upgrade.

All of that is standard advice for road and running gear on any bike, with a few Triumph specific bits. If your bike is a "runner" you will think of it as modernized and tuned up. If your bike is a "shower" some of those mods might be too modern, and spoil the show value of the bike. Most are invisible - with the exception of the break.

More specifically about that particular bike - vibration really is part of the nature of the original British 360 degree vertical twin engine.

The 360 degree twin, in the T120 and T140 will ALLWAYS vibrate. Not up and down, but front to back. I know that sounds weird, but the crankshaft has counterweights that weigh the same as the pistons and connecting rods. As the pistons go down, the weights come up, and vice versa. So, the engine is balanced in the up and down plane. But, nothing is going back and forth to counterbalance these weights in forward and backward motion. That is the fundamental source of engine vibration. It won't go away. Ever. In the modern reincarnation of the Bonneville they incorporate a shaft, with a weight on it that spins to counteract that motion - vibration was enough of a complaint that the redesign addressed it specifically.

I have a T140. It does shake, but over 2500 rpm or so it isn't so bothersome. The engine in the Bonnie is rigidly bolted to the frame, not rubber mounted.

Things you can do to help with engine vibration? There are tuning issues that can increase vibration or make annoying vibrations at different rpm. If your engine is in tune and running well, and you STILL think it vibrates too much, trade the bike for a 1960s BMW R60 boxer.

Things that can cause non-characteristic vibrations? Make sure both carburetors are tuned exactly the same and throttles come off idle at exactly the same time. This is an annual tuneup item. Also, replace the points based ignition with a Boyer electronic ignition kit. More precise timing spark and more consistent spark will make for smoother running. That is a one time upgrade and it shouldn't break the bank.

If you are really, really concerned about vibration you can make sure you have stock camshaft, run lower compression pistons, and replace stock carbs with more modern CV carbs - Mikunis are common. If you do that, you would lose a lot of the character that makes the Bonneville a great bike. They aren't a Honda 90, or a BMW boxer. They are raw, require kick start, are messy and high maintenance, and have huge variation in build quality.

In the end, there is something about the Triumphs that is magic. Those guys knew how to turn $10 of petrol into 120 miles pure joy. No other bike feels quite like a Bonnie. Some vibration is part of that feel.

There are folk legends of 650s and 750s being disassembled, shipped off to mythical machine shops for "blueprinting" and balancing, but I have never see such a thing happen in 40 years of playing with Triumphs. Fundamentally, the design IS going to shake, unless you redesign it and put in a counterbalancing shaft.

Enjoy the unique character. IF you really want to stop the vibration, just turn the ignition off!


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1 Answer

Excecessive vibration in pegs,seat,and handle bars


Hi Anonymous, and the usual suspects are:
1. Wheels and or tires unbalanced, worn or damaged.
2. Engine/transmission/vehicle not aligned properly.
3. Primary chain badly worn or links tight as a result of insufficient lubrication or misalignment.
4. Engine to transmission mounting bolts loose.
5. Upper engine mounting bracket loose.
6. Ignition timing incorrect/poorly tuned engine
7. Internal engine problem/ flywheel shift
8. Broken frame
Good luck

Jul 26, 2012 | 2011 Harley Davidson FXDF Fat Bob

1 Answer

2010 Yamaha V Star 950 Tourer exessive vibration


Hi, Jjlaporte and the usual suspects are:
1. Wheels and or tires worn or damaged.
2. Engine/transmission/vehicle not aligned properly.
3. Primary chain is badly worn or links too tight as a result of insufficient lubrication or misalignment.
4. Engine to transmission mounting bolts loose.
5. Upper engine mounting bracket loose.
6. Ignition timing incorrect due to a poorly tuned engine.
7. Internal engine problem flywheels have shifted.
8. Broken frame.
9. Stabilizer links worn or loose.
10. Rubber mounts loose or worn.
11. Rear fork pivot shaft nuts loose.
12. Front engine mounting bolts loose.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
http://www.ymhmotoboard.com/topic/beefing-up-v-star-950-in-the-high-end-1
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2 Answers

Severe vibration and knocking sound!


sounds more like a ujoint or a center support for the drive shaft. also check and make sure that the flywheel bolts have not come loose. also check the harmonic balancer and make sure it is not seperating

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1 Answer

Clicking sond in right front end or engine/trans? on decleration


Sounds like your CV axle is worn out and making noise. Time to replace it.

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Vibration at 2900 RPM


I have the same problem with my Roadking except it wasnt dropped. I did a full alignment of rear tire to engine, aligned the rear tire to front tire, aligned the engine and replaced the front motor mount. Nobody seems to have an answer, that I've talked to anyway. If you find a cure let me know, If I find one I'll let you know.

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Cuting vibration


Hi, I ride a 1984 shovelhead flh. My riding style seems to be like yours. A couple of things that I did on my bike to help with vibration were to install the polyurethane riser busings and use some cushioned grips. These solid mount shovels will have some vibes. If your engine is well balanced and you use loctite on your fasteners it should help cut down on the vibes. Also make sure that your steering head bearings and swingarm bearings are good because they can have an adverse affect on handling. I know that others who are more knowledgeable will also make some great suggestions. I have been hanging around and looking at these posts for a while and just decided to join. Also i think that if you stay with the rear chain setup you will have more and less expensive final gear ratio options to play with. My bike runs the 32 tooth front pulley and a 70 tooth rear belt setup and could use a little taller top end at 75 but it works for me with little vibration. Reducing the rpm's at higher speeds will certainly make your ride more comfortable.Good luck on your project.

Nov 20, 2008 | 2008 Harley Davidson FLTR Road Glide

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