Question about 1984 Suzuki XN 85 Turbo

1 Answer

Hallo I have a problem can´t get lower than 2000rpm the probably an leak in intake but the engine rev´s it self from 3000-4500 and it it seems to cut there if i am in a corner then i let go of the trottle it jumps like a wild horse. What can corse that? sorry my english is bad.

Posted by on

  • benni_johans Jul 02, 2009

    This is a turbo an it is not a carburator config but an electronic injekted jetronic so the problem can bee so many tings.The suzuki xn85 was one of the first direktinjekted motorbikes around.
    I can not see or hear anyting,so before i start pulling all of i tought maybe sambody else have had the same problem.
    MVH Benni.



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 3,567 Answers

You are corect. an air leak between the carb and the cylinder is the problem. It is possible a bad head gasket could let in air also.

A “very helpful” rating on this answer? Thanks!

Posted on Jul 02, 2009

  • tombones Jul 02, 2009

    I assumed there was a carb involved when an air leak was mentioned. My bad. Any chance of a cracked injector? What controls the turbo kicking in? Fuel feed mapping going bad? I am unfamiliar with turbos and only know second hand the little that I do know about them. Sorry I wasn't more help on the problem.

    Also, the FixYa system is set up such that your posting disappears once it gets a solution. You may want to Re-post your question so others can have a chance to provide an answer. Since you feel your English is less that great, I am taking the liberty to suggest the following posting.

    Factory turbocharged, fuel injected Suzuki, 1984 XN85 673cc inline four cylinder can´t get lower than 2000rpm. The engine sometimes rev´s itself from 3000-4500 and you never know when it will happen. The engine often cuts out in a corner, so I let go of the throttle. That is when the bike jumps forward like a wild horse. Any turbo experts out there willing to take on a challenge?



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Engine noise at 2000RPM

sounds like a transmission, try to shift it to neutral after you reach 2000 rpm + and see if the whining will stop

Btw, I’m available to help over the phone in case u need at

Jul 22, 2014 | 2007 Hyundai Getz 1.6

1 Answer

The revs on my bike go up and down 2000rpm to 4000 hyosung gt250 F injection 59 plate

Air is leaking through the intake manifold. Re torque all the nuts and bolts of intake manifold or replace the seals and/or gaskets of the same.

Dec 06, 2013 | Motorcycles

1 Answer

Engine reving on start

Hi there,

When cold, modern EFI engines are designed to idle higher, until the engine warms to operating temperature. The idle should then return to around 700rpm.

If your engine still revs at 2000rpm after warming up, then there is a problem with the fuel/air mixture, or a possible air or vacuum leak.

In this case, your vehicle's computer will have stored the appropriate fault code/s. Have your codes read by your local Renault dealer to determine which circuit is the cause.

Feb 21, 2013 | Renault Cars & Trucks

1 Answer

With the TPS connected, it won't go pass 2000rpm.

different airflow meter calibrations,do you have the z32 airflow meter installed?

Oct 31, 2017 | Nissan 300ZX Cars & Trucks

1 Answer

My 2002 Ford Ranger starts fine just replaced the battery. After it starts it will rev up to 1800 then back down to 200. It will do this maybe 3 time before it dies. i can hold the pedel down to keep it...

probably have a vacuum leak where the Upper Ram of the Intake manifold meet the Lower Intake Manifold. Listen for a vacuum leak (hissing sound) near that point, We used to spray a small amount of Carb cleaner near the joint of the 2 Manifolds & observe for a change in the Engine speed, to verify the vacuum leak.

Nov 11, 2009 | 2002 Ford Ranger Regular Cab

2 Answers

2005 Chevrolet Cavalier, No power

check air intake hose first, including MAF sensor (if dirty must clean) , then check for all other hoses for leaks and last but not least check air filter.

Feb 19, 2009 | 2005 Chevrolet Cavalier

1 Answer

Very uneven running

Here are a few things to check check idle speed control , TPS- throttle position sensor and also very important check for vacuum leak on intake any broken hoses or intake itself gasket leaking Very possible for this problem. A simple test is when engine is running up and down use an intake cleaner (in compressed can) and spray around intake manifold if there is a vacuum leak the engine will surge up . This could man intake gasket or vacuum leak. Good luck and thanks for using FIX YA.

Feb 01, 2009 | 1993 Suzuki Swift

1 Answer

Idleing problems

Hello,it sounds to me that you have a vacume leak.Check a vacume tube that is under the throttle body right in the middle of the firewall and the intake manifold.This vacume tube has a rubber elbow shaped connector at the end of it on the engine side.They regularly fail.

Sep 23, 2008 | 2003 Ford Focus

Not finding what you are looking for?
1984 Suzuki XN 85 Turbo Logo

Related Topics:

97 people viewed this question

Ask a Question

Usually answered in minutes!

Top Suzuki Experts


Level 3 Expert

80608 Answers

Arnie Burke
Arnie Burke

Level 3 Expert

4988 Answers


Level 2 Expert

83 Answers

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

Answer questions

Manuals & User Guides