Summary
The Suzuki Gixxer 155 is a popular motorcycle recognized for its performance and adaptability. One critical component contributing to its performance is the timing chain tensioner, a device that ensures the timing chain, which synchronizes the crankshaft and valvetrain, operates under constant tension. This article provides a comprehensive, step-by-step guide to replacing the timing chain tensioner in your Suzuki Gixxer 155, highlighting the importance of the tensioner, common issues with the stock component, necessary tools and equipment, as well as potential risks involved in the replacement process.
Issues with the stock timing chain tensioner, including unreliable automatic adjustment and risk of severe internal engine damage, have been reported across various Suzuki GSX-R models. Despite efforts by Suzuki to address these problems, issues persist, leading many users to opt for a manual cam chain tensioner (CCT) from APE, praised for its reliability and effectiveness.
Replacement of the tensioner can be a complicated and tedious process, especially for individuals without proper mechanical knowledge. It requires specific tools, a clear understanding of the bike’s mechanics, careful attention to timing and clearances, and a meticulously planned approach. If the problem lies with the timing chain rather than the tensioner, it is recommended to have the work done by experts.
Replacing the timing chain tensioner can significantly improve the performance and longevity of your Suzuki Gixxer 155. This modification is particularly recommended for riders seeking to enhance their motorcycle’s performance through reliable and effective components. However, it’s always advised to refer to a trusted guide or manual, considering the complexity and potential risks of the task.
Importance of Replacing the Timing Chain Tensioner
The timing chain tensioner is an essential part of the Suzuki Gixxer 155, and other similar motorcycles, as it helps to maintain the critical timing link between the crankshaft and the valvetrain of 4-stroke motorcycles. It is typically secured on a crankshaft gear behind the ignition rotor and runs up onto the camshaft gear(s) . When the timing chain tensioner fails, it often results in catastrophic engine failure, the severity of which depends on the operational state of the engine at the time of failure .
It is essential to listen for a ticking or clicking noise from the right side of the motor, particularly noticeable at idle. Some describe this sound as similar to a diesel engine. If these noises are detected, it is crucial not to operate the motor or ride the bike as this could lead to severe internal engine damage .
Replacing the timing chain tensioner is a fairly straightforward process. However, replacing a timing chain can be a more complicated and tedious task. It is not recommended for individuals without proper knowledge to undertake this task at home. If there are issues with the timing chain, it is generally best to have the work done by experts .
Understanding the clearances in the system is important as bench clearances are not operating clearances, and these can change over time . This understanding becomes even more crucial as you start building motors with narrower Piston to Valve (PTV) clearances .
Understanding Common Issues with the Stock Timing Chain Tensioner
The stock timing chain tensioner on the Suzuki Gixxer 155, despite being automatic, has been known to present several issues. While the tensioner is designed to adjust itself, changes in the engine’s temperature and the flexing of the chain and guides under load can disrupt this process. These variables can alter the cam timing, which could lead to inconsistent tension on the chain.
Historically, this has been an issue for various models and years of the GSX-R series, with the automatic CCT widely regarded as unreliable. Despite Suzuki acknowledging this problem in 1999 and replacing the old CCTs with a revised part, the issue persists. It is widely agreed upon that the manual CCT from APE is a superior component.
Due to these potential issues with the stock tensioner, it is suggested to replace it as a preventative measure or if you notice any of the above symptoms. If you decide to install a manual tensioner, it is recommended to check the cam chain tension every 6000 miles. This check-up, however, can only be performed on manual tensioners.
Tools and Equipment Needed for Replacement
To successfully replace the timing chain tensioner on your Suzuki Gixxer 155, you will need specific tools and equipment. The replacement chain tensioner most widely used and recommended by experts is the manual CCT from APE. This tensioner is available for purchase from APE’s official website.
When undertaking this task, it is essential to have a comprehensive kit of nuts, bolts, and screws available for use. This should include components such as the back light screw, beeding screw, bleeder screw, brake cam lever nut bolt, brake rod nut, chain adjuster, and many others. These pieces will be vital in ensuring the stability and efficiency of the replaced timing chain tensioner.
As part of the replacement process, you’ll also need a CAM chain guide roller, chain kits, a chain lock, gear box sprocket, main chain, rear sprocket, timing gear, timing kit, and timing roller. These will be essential in setting up the timing chain and adjusting its tension once the old tensioner is replaced.
Moreover, careful attention must be given to correctly zip tie the chain to the cam sprockets when releasing the tensioner. This will prevent the chain from jumping a tooth during the replacement process.
Preparing for the Replacement Process
Before starting the replacement of the timing chain tensioner in a Suzuki Gixxer 155, a well-prepared approach and a clear understanding of the mechanics of your bike is crucial.
Begin by removing the valve cover, an action that would help you assess the state of the tensioner and its correlation with the timing chain. Though some riders might not prefer removing the valve cover, doing so ensures accurate tensioning and verifies that the timing has not jumped during installation . Pay special attention to the operating clearances, which differ from bench clearances . This precaution becomes crucial when dealing with engines having minimum piston to valve (PTV) clearance.
Make sure that manual cam chain tensioner (MCCT) replacement is what your bike needs to avoid wasting resources on fixing a non-existing problem. You can adjust a manual tensioner by feel, which typically involves screwing in the adjuster until you encounter significant resistance. Afterward, rotate the engine forward a few times, check the tension, and if it remains consistent, back off around 3/4 turn .
Remember, the automatic tensioner bolts can back out, causing timing jumps, bent valves, and other internal damage. Therefore, ensuring the timing is correct is crucial for avoiding such issues. For understanding the timing marks on your engine, refer to the owner’s manual. This step requires extra care as it can be a determinant of success or failure of the replacement process .
Step-by-Step Guide to Replacing the Timing Chain Tensioner
The timing chain tensioner on a Suzuki Gixxer 155 is a vital component of the motorcycle’s engine that maintains tension in the timing chain, ensuring the synchronized motion of various engine parts. This chain, when running, elongates due to heat and wear and tear over time. A timing chain tensioner prevents the timing chain from becoming loose when it elongates. A loose timing chain can cause engine misfires, poor performance, and, in severe cases, may prevent the engine from starting or damage the engine’s internals.
The owner’s manual is crucial to understand the timing marks on your engine and where they need to be aligned. Rotating the engine also allows the chain tensioner to settle and find its initial set point.
While adjusting the tensioner, one can rotate the engine 3 degrees before the cams move. Avoid adjusting the tensioner with the motor running, as this could lead to a tight chain and potentially damage the guides.
It’s recommended that you pull the valve cover and cam chain guide to check the chain for tension when you adjust the tensioner. The tensioner is located at the back of the engine block. To access it, you need to raise the fuel tank. The tensioner is on the throttle side of the motor. To remove it, remove the bolt numbered 2.
Always remember, if the problem lies in the timing chain, it’s better to let experts handle it. This process, though straightforward, requires careful attention to detail and a clear understanding of the motorcycle’s engine mechanics.
Addressing Potential Complications and Risks in the Replacement Process
Replacing the timing chain tensioner on a Suzuki Gixxer 155 can present a variety of potential complications and risks. Despite engines being equipped with automatic cam chain tensioners, these tensioners often struggle to handle abnormalities in the chain. This issue can lead to the chain operating with varying tension as it navigates around the gears, and in severe cases, there may not be enough tension in the system to prevent the chain from jumping gear teeth .
Many individuals have reported problems with the stock tensioner on various models and years of Suzuki GSX-R, regardless of the use of the automatic CCT. These complications often become more significant when building motors with less forgiving piston-to-valve clearances . The tensioners may not melt if the chain is a bit tight, but the proper adjustment is critical for optimal performance and longevity .
The replacement process itself can also be complex. Replacing a timing chain is considered a tedious task and is not recommended for those without proper knowledge to perform at home. Thus, if the issue lies with the timing chain, it is often recommended that the task is handled by experts .
Moreover, setting the tension perfectly requires taking off the valve cover, which some people might not want to do. There’s also a risk of jumping timing on the install if it’s not done correctly. Therefore, it’s essential to make sure that replacing the manual CCT is truly necessary before undertaking this task to avoid wasting time and effort . Properly adjusting a manual CCT can be done by feel, but this method requires experience and finesse .
Improving Motorcycle Performance Through Modifications
The Suzuki Gixxer 155 is a highly customizable motorcycle, with many modifications available to improve performance. One such modification is replacing the timing chain tensioner, which is a critical component in maintaining the timing link between the crankshaft and valvetrain. The timing chain tensioner ensures the chain remains at constant tension, playing a vital role in the overall functioning of the engine.
Replacing the tensioner can be a complex process, requiring careful attention to detail and a solid understanding of the bike’s mechanical setup. However, it is a modification that can greatly improve the Gixxer’s performance and longevity.
The automatic cam chain tensioner provided by the manufacturer has been reported to have issues and is often replaced with a manual CCT from APE, which has received positive reviews from users for its reliability and effectiveness. By installing a manual CCT from APE, you can eliminate the risk of the automatic tensioner bolts backing out, which could result in timing jumps, bent valves, and even engine failure.
This modification, while complex, can be done at home with the right tools and guidance. It’s worth noting that the exact steps can vary depending on the specific model and year of your Gixxer. It’s always recommended to refer to a trusted step-by-step guide or manual when performing this modification to ensure accuracy and safety.
