Suzuki Impulse GSX 400

[S750WP]

Just to show how my chain oiler works.

 

http://p1.bikepics.com/pics/2010%5C04%5C22%5Cbikepics-1958150-full.jpg

[S750WP]

The meter and exhaust for the Impulse special edition is nice.

 

[Manjan-Bhai]

The meter and exhaust for the Impulse special edition is nice.

 

 

Agreed, i like the way the meter responds when the bike is switched on.

[S750WP]

GSX400 Impulse became soon somewhat of a cult bike in Japan, a fact that held the used bike prices high. The GSX400 Impulse owner haven't had the same problems as many GSX400 owner's in the early eighties with overheated engines, burned up alternators and corroding exhaust etc. The Impulse is as reliable as any other modern Japanese motorcycle with good performance.

 

There's nothing wrong with the bike, the engine runs smooth and quiet, the top end is particularly rattle free. The brakes (290 mm double disks at the front and a 250 mm single disk at the rear) are excellent and the engine is powerful but the engine never manages to find a sweet spot with enough of torque.

 

Sum summarum, the bike could be described as adequate. The suspension and comfort are adequate, the geometry's relatively fast turning and the stability at higher speeds is not as good as old bruisers like GS550. If the Impulse never inspires neither does it frighten.

 

 

Engine Type: Liquid-cooled DOHC inline-four 4-stroke

Cylinder Volume: 399 cc

Bore x Stroke: 52.0 x 47.0 mm

Compression Ratio: 11.8:1

Power output: 53 hp (37 kW)/ 11.000 rpm

Torque: 37 Nm (3.8 kg-m)/ 9.500 rpm

Fuel Tank Capacity: 16 liter

Overall Length: 2 080 mm (81.9 in.)

Overall Width: 740 mm (29.1 in.)

Overall Height: 1 110 mm (43.7 in.)

Wheelbase: 1 435 mm (56.5 in.)

Seat Height: 760 mm (29.9 in.)

Ground Clearance: 120 mm (4.7 in.)

Dry Weight: 175 kg (385 lbs)

Transmission: 6-speed Constant Mesh

1st Gear Ratio: 3.363

2nd Gear Ratio: 2.307

3rd Gear Ratio: 1.750

4th Gear Ratio: 1.437

5th Gear Ratio: 1.250

6th Gear Ratio: 1.136

Primary Drive Ratio: 1.750

Final Drive Ratio: 3.428

Starting System: Electric Starter

Ignition System: Full Transistor

Oil Capacity: 3.2 liter

Caster: 25° 40'

Trail: 98 mm (3.86 in.)

Front Tire: 110/70-17 54H

Rear Tire: 140/70-17 66H

Front Brake: Double Hydraulic Disk

Rear Brake: Single Hydraulic Disk

Fuel Consumption: 36,5 km/liter (60 km/h)

Carburetor Type: BST29

Turning Radius: 2,7 meter

Steering Angle (left to right): 36°

 

 

Is it possible to fit wider rear tire 160 for the impulse400? currently I am on 140.

Edited April 29, 2010 by S750WP

[byte77]

How many litres of engine oil are needed for impulse?

I think I filled in too much at 3.2L... that's why the EO leakage.

[S750WP]

How many litres of engine oil are needed for impulse?

I think I filled in too much at 3.2L... that's why the EO leakage.

 

 

I fill less than 3L (approx 2.7L), put the bike on main stand (wait approx 1minute) and and check the side view window on the side of the engine, oil level should be between L and F.

Edited May 6, 2010 by S750WP

[Manjan-Bhai]

I fill less than 3L (approx 2.7L), put the bike on main stand (wait approx 1minute) and and check the side view window on the side of the engine, oil level should be between L and F.

 

usually when I change my oil filter, more EO can fit in. Approx about 3Ltr in total.

[S750WP]

To derestrict our bike to make it go even faster

 

 

http://cgi.ebay.com/ebaymotors/Derestricted-CDI-Ignition-SUZUKI-INAZUMA-GK79A-Ignitor-_W0QQcmdZViewItemQQhashZitem414ea18739QQitemZ280492083001QQptZMotorcyclesQ5fPartsQ5fAccessories

[Manjan-Bhai]

To derestrict our bike to make it go even faster

 

 

http://cgi.ebay.com/ebaymotors/Derestricted-CDI-Ignition-SUZUKI-INAZUMA-GK79A-Ignitor-_W0QQcmdZViewItemQQhashZitem414ea18739QQitemZ280492083001QQptZMotorcyclesQ5fPartsQ5fAccessories

 

can the ol'engine take it ?

[S750WP]

can the ol'engine take it ?

 

Mine engine is still pulling strong, don't see any problem with a little more usable torque and power.

[byte77]

To derestrict our bike to make it go even faster

 

 

http://cgi.ebay.com/ebaymotors/Derestricted-CDI-Ignition-SUZUKI-INAZUMA-GK79A-Ignitor-_W0QQcmdZViewItemQQhashZitem414ea18739QQitemZ280492083001QQptZMotorcyclesQ5fPartsQ5fAccessories

 

 

You've bought and used this "Derestricted CDI Ignition SUZUKI INAZUMA GK79A Ignitor" ? Better performance? Thought you're selling your Impulse?

[Manjan-Bhai]

You've bought and used this "Derestricted CDI Ignition SUZUKI INAZUMA GK79A Ignitor" ? Better performance?

 

at the cost of higher fc.

[S750WP]

at the cost of higher fc.

 

Nothing is free in this world. More power = More Fuel

[S750WP]

You've bought and used this "Derestricted CDI Ignition SUZUKI INAZUMA GK79A Ignitor" ? Better performance? Thought you're selling your Impulse?

 

Will be keeping the bike till the COE ends and scrap if there is no buyer.

 

I will buy the derestrict CDI if mine is fried.

 

Anyone wants to buy a spare CDI to keep for spare, letting go mine for $200 so I can fund for the new CDI??

[byte77]

My rear brake pad and disc have just been replaced not long ago. Now the rear brake is buzzing quite loud when stepping it gently during slowing down. It also buzzes loud when I push the bike backward. Do I have to replace the brake pump too?

[S750WP]

My rear brake pad and disc have just been replaced not long ago. Now the rear brake is buzzing quite loud when stepping it gently during slowing down. It also buzzes loud when I push the bike backward. Do I have to replace the brake pump too?

 

Could be your brake pads, cheapo one will generate alot of brake dust and cause the noise. Try using compressed air to spray at the brake area and try again. How about your brake disc condition, are they new or 2nd hand?

 

If problem persist after checking the above, suggest to overhaul your brake caliper, replace piston and seal if they are not smooth. The brake pump hardly gives problem.

[Manjan-Bhai]

My rear brake pad and disc have just been replaced not long ago. Now the rear brake is buzzing quite loud when stepping it gently during slowing down. It also buzzes loud when I push the bike backward. Do I have to replace the brake pump too?

 

I had the same problem once. AFter I did the full servicing of the brake pump (seals and oil), it was a lot better. I realise this happened cos I took too long to change the brake pads (waited for it to be really thin). Hence, one of the seals broke when the new brake pads were put in.

[S750WP]

This thread is dying and lost in the sea of other post, guess there are not much Impulse rider around.

[alexbong]

This thread is dying and lost in the sea of other post, guess there are not much Impulse rider around.

 

last night saw 1 otw to JB. hehehe. btw seldom see this model on the rd so it's consider 'cool' model. and don't thk hv authorrize dealer in SG for Suzuki?? only PI??

[S750WP]

last night saw 1 otw to JB. hehehe. btw seldom see this model on the rd so it's consider 'cool' model. and don't thk hv authorrize dealer in SG for Suzuki?? only PI??

 

Not sure about dealer, but for spare parts and servicing no problem at all.

[Trance Energy]

I'm keeping a Impulse as a hobby bike - simply dig the retro look. It's already in quite good condition when i take over it and i hope to maintain the bike as best as i could.

 

S750wp,

I read thru this threads and man..u such a hands on guy, thumbs up to u.

Though i'm also a hands on guy but doubt my skill is up to your mark.

 

Cool.. Lets keep this old thread going.

[S750WP]

I'm keeping a Impulse as a hobby bike - simply dig the retro look. It's already in quite good condition when i take over it and i hope to maintain the bike as best as i could.

 

S750wp,

I read thru this threads and man..u such a hands on guy, thumbs up to u.

Though i'm also a hands on guy but doubt my skill is up to your mark.

 

Cool.. Lets keep this old thread going.

 

Thanks and welcome to the Impulse thread, there are less than 10 owners here, I am also keeping the bike, may renew the COE in 2013 if its cheap else will scrap it since there is no resale value. Mainly use for transport, its fuel efficient and reliable bike (if properly maintain).

[S750WP]

The GSX1400 paint scheme turns out well on our impulse, was quoted $320 to paint this design, $280 if dismantle the parts yourself (still considering)

 

Our impulse not so retro(uncle look) anymore with the correct paint scheme and exhaust.

 

http://www.moto8.cn/attachments/day_091012/09101215221f8a57211e0abe3f.jpg

Edited July 18, 2010 by S750WP

[byte77]

Yesterday rode my Impulse all the way up to Rawang, Selangor to visit friend and back to Sg on midnight. Spent 10 hours on 800 km. Was worried if the little engine leak could expose bigger problem on the long journey. Glad that it ran smoothly and overtook cars on NSHW at breeze. Going to do valve cleansing and balancing for it. As for the leak, maybe try to change engine gasket and see how.

Edited July 18, 2010 by byte77

[S750WP]

Yesterday rode my Impulse all the way up to Rawang, Selangor to visit friend and back to Sg on midnight. Spent 10 hours on 800 km. Was worried if the little engine leak could expose bigger problem on the long journey. Glad that it ran smoothly and overtook cars on NSHW at breeze. Going to do valve cleansing and balancing for it. As for the leak, maybe try to change engine gasket and see how.

 

Must be very good friend to travel 800km to meet her:lovestruck:

 

Went outing with SBF on my impulse400, 300km to and fro, no issue at all.