Question about 1999 Moto Guzzi Sport 1100 i

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Horsepower Hello all. New to Guzzis as well as this forum. But I always liked Guzzis and recently found a 1100 Sport carb I could not pass up. Beeing an incorrigible hot rodder and not beeing able to withstand the urge to go completely overboard I was wondering what horsepower can be had from this motor. My gameplan includes 49/42mm valves

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Serious porting 96 or 97mm pistons 382 cams 12-1 or so compression etc. So far I have been told by a few people that 110-115rwhp is pretty much unattainable(always followed by some giggling and snickering in the background). From my experiences with other motors and based on rpm, valve sizes etc. that should not even be an issue, but then again these were completely different motors. What then would be an attainable goal?,Yes, there are always companies who will promise heaps of HP. What is never mentioned is reliability or service intervals. If you want 'Race Bike' performance you can have it, but about 100RWHP is all you are realistically likely to get from any 2 valve Guzzi engine and I don't give a toss what anybody else claims. Also using the biggest valves is NOT always the best way to get ueable HP, nor is the stupidest cam with ridiculous timing. There are many, MANY issues other than valve size that contribute to gas flow. There are also many, many things that will effect how well, or not, a cam will work. At the end of the day you are looking at a 12 year old motorbike based on a 40 year old engine platform. If you want more performance go and spend money on suspension and to a lesser degree brakes. A *good* 1100 Sport will produce in the mid eighties HP. If that isn't enough? Go buy an R6 or even a Griso 1200. If you want to play at extracting HP from a Guzzi 2V motor that's fine, but if that is the case why ask what people have done before? Use your own ideas and then compare them to previous efforts,,,

Posted on Nov 10, 2008

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I have a misfire on a front cyclinder, as it has new plugs.


If the cable is bad, you here the hissing sound, If bad coil, the cylinder would be dead.
It could be that you have to sync the carbs (if you change the pipes to a custom ones or installing a sport air filter, you have to sync the carbs, sometimes you have to change the carb jets also- slow and main)

Jun 28, 2014 | 1994 Honda VT 1100 C Shadow

1 Answer

Does 2002 v star 1100 start up in gear with clutch pulled?


Not by default.

The switch is normally open and when you pull in the clutch it closes the switch. Some owners like to by-pass the clutch switch and that allows the bike to start in gear.

You can by-pass the clutch safety switch in a couple of ways. Details and discussions are available on this forum (locate the "web page" tab at the top of the main page):

http://forums.delphiforums.com/n/main.asp?webtag=yamaha1100&nav=start&prettyurl=%2Fyamaha1100%2F&gid=2132573035

If it's already happening for you, these instructions will serve to help you locate where the change was made.

Jun 03, 2014 | 2002 Yamaha V Star 1100 Classic

1 Answer

Backfires on acceleration


Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. 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.
3. Faulty main circuit breaker and or connections.
4. Faulty ignition coil and or connections.
5. Faulty spark plug, oil or gas fouled, wrong heat range or service type, wrong gap, loose in the cylinder head, broken electrode or insulator.
6. Faulty spark plug cables, leaking or broken, internal damage.
7. Faulty ignition module, switch, CKP, MAP, CMP, sensor and or any connector in the ignition circuit could have corroded, loose, or broken pins/sockets
8. Burnt exhaust valve or air leak in the exhaust system.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
http://www.starbikeforums.com/forums/49-v-star/28593-vstar-1100-backfiring-one-cylinder.html
Popping and backfiring in 02 Yamaha VStar 1100 Twin Forum Harley Davidson...
http://www.sloneservices.com/SilverBack/Other-Stuff/V-StarShopManual99-07.pdf
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2000/LIT-11626-13-36_96.pdf

Apr 29, 2013 | 2003 Yamaha V Star 1100 Classic

1 Answer

Front cylinder backfire


Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. 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.
3. Faulty main circuit breaker and or connections.
4. Faulty ignition coil and or connections.
5. Faulty spark plug, oil or gas fouled, wrong heat range or service type, wrong gap, loose in the cylinder head, broken electrode or insulator.
6. Faulty spark plug cables, leaking or broken, internal damage.
7. Faulty ignition module, switch, CKP, MAP, CMP, sensor and or any connector in the ignition circuit could have corroded, loose, or broken pins/sockets
8. Burnt exhaust valve or air leak in the exhaust system.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Combustion issues in the front cylinder in 1100 Star Tech Forum
http://www.starbikeforums.com/forums/49-v-star/28593-vstar-1100-backfiring-one-cylinder.html
http://www.sloneservices.com/SilverBack/Other-Stuff/V-StarShopManual99-07.pdf
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2000/LIT-11626-13-36_96.pdf

Jun 14, 2012 | 2004 Yamaha V Star 1100 Classic

1 Answer

Hello please advice as to why th ebike will just idle and with choke on full but just off if choke is off or acceleratoer is turned on high i have 2004 vstar 1100 with only 420kms


sounds like the carbs are gummed up since its a low milage bike. either open the carbs and clean them or use a fuel system cleaner and hope for the best.

Aug 23, 2010 | 2003 Yamaha V Star 1100 Classic

1 Answer

I have a Yamaha V star 1100 (2002). Do I adjust the float levels so that the fuel tube mark is level with the mark on the bowl. The brand new book I have has Virago carbs in it...useless. Can't find this...


Hi, Mitchellb003 for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Carb Jetting Star 1100 Wiki Knowledge Base
Adjust Float level Maxair Predator Pro Yamaha Star 1100
http://www.sloneservices.com/SilverBack/Other-Stuff/V-StarShopManual99-07.pdf
OEM parts for Yamaha
http://www.sloneservices.com/SilverBack/Other-Stuff/V-StarOwner%20Manual.pdf

May 15, 2010 | 2002 Yamaha V Star 1100 Classic

2 Answers

1883 Kawasaki gpz with macooni carbs wont


http://www.kawasakimotorcycle.org/forum/faqs/22157-kawasaki-gpz-550-a.html

Sep 22, 2009 | 1995 kawasaki GPZ 1100

1 Answer

I have a 2002 V-Star Classic. I recently had new


Why did you have new carbs installed? If the new ones have bigger throats, there might not be sufficient air velocity to pick up fuel when accelerated. The starter problem sounds like the over-running clutch on the starter shaft has oil on it or the chain from the starter to the engine is off/broken. The whine is due to the starter being unloaded and trying to self-destruct from over-revving.

Jul 05, 2009 | 2002 Yamaha V Star 1100 Classic

1 Answer

Wont start without choke


I am having a similiar problem. bmw r 1100 s will only start with full choke and will die if I cut off choke or give it any throttle. This is my first bike and it has been sitting in a garage for 2 years. I took out the carbs, cleaned them and rebuilt them. I didn't find any residual in the carbs and they were very clean. Today, I was able to get the bike running and took it down the neighborhood but after the bike warms up it idles at 6K! Man... If I can't find any answers from this forum, I will probably drop it off at the motorcycle shop just down the hill from me. Any suggestions anyone? I think I will try to drain the fuel and give it new gas. But still....

Nov 20, 2008 | 2003 BMW R 1100 S Boxercup Prep

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