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Thread: Hero Impulse ownership experience

  1. #2951
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    Default Re: Hero Impulse ownership experience

    Quote Originally Posted by trnaren View Post
    I just booked one yesterday... Will now ponder whether to take delivery when stocks arrive... However will test ride and and decide
    which variant?

  2. #2952
    Addicted trnaren's Avatar
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    Default Re: Hero Impulse ownership experience

    Quote Originally Posted by zandubalm View Post
    which variant?
    Xpulse 200

  3. #2953
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    Default Re: Hero Impulse ownership experience

    Hi,

    My Impulse needs a carburetor replacement as the Carburetor piston is getting stuck at one position which is affecting the acceleration and idling.

    Now Southern Motorcycles (Hero Genuine Spare) has stock of a carburettor assembly and quoting around 5.5k

    Is it worth to replace the stock carburetor or opt for any compatible carburetor from difference bikes like unicorn/pulsar etc.???

  4. #2954
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    Default Re: Hero Impulse ownership experience

    Quote Originally Posted by suhail_ssr View Post
    Hi,

    My Impulse needs a carburetor replacement as the Carburetor piston is getting stuck at one position which is affecting the acceleration and idling.

    Now Southern Motorcycles (Hero Genuine Spare) has stock of a carburettor assembly and quoting around 5.5k

    Is it worth to replace the stock carburetor or opt for any compatible carburetor from difference bikes like unicorn/pulsar etc.???
    Opt for a compatible carburettor.

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    Addicted sancreation's Avatar
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    Default Re: Hero Impulse ownership experience

    Quote Originally Posted by suhail_ssr View Post
    Hi,

    My Impulse needs a carburetor replacement as the Carburetor piston is getting stuck at one position which is affecting the acceleration and idling.

    Now Southern Motorcycles (Hero Genuine Spare) has stock of a carburettor assembly and quoting around 5.5k

    Is it worth to replace the stock carburetor or opt for any compatible carburetor from difference bikes like unicorn/pulsar etc.???
    You can use unicorn's vacume piston costs around 640rs and works like charm.

  6. #2956
    Rusted Ankitvile's Avatar
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    Default Re: Hero Impulse ownership experience

    Or you can buy the stock one which costs rather less, if available. Either that or just take out the slide and turn it approximately 160-180degrees till the two triangular depressions on the slide at the bottom of the same are free, and visible when looked from the carb intake side. They tend to cock the slide jam along the barrel it runs in. I ran for almost 60000kms on the stock slide with that lil adjustment.

    Or go for another carb. Mikuni I'd suggest. Relatively cheap, spares (of the carb) are easily available and lots of in-carb parameters to tinker around with according to you needs.

  7. #2957
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    Default Re: Hero Impulse ownership experience

    Quote Originally Posted by Ankitvile View Post
    Good to see you again Bala. Thanks for the insiders, a real help to my vague comprehension of motorcycle dynamics.




    Didn't you have the XR's linkage rear monoshock? And hows the Zedling performing. Its a tad costly though. Any other alternatives you suggest? Xpulse's?



    I'm on the Karizma's mill now too. Need a new carb. Solely because the stock Keihin is prone to malfunctioning. What would BS29 get me in comparison to Keihin26 as in ZMA? The 33mm fron 200NS seems a lil overkill to me. Mid and low end is what I need and a decent fuel economy too. Given I'll be mostly on tours around Himalayas.

    CV Carb's are good for mileage and perform decent with with less headache but have you tried D slide 28mm PWK carb or Flat slide VM 28mm carb.

    ----consecutive posts auto-merged-----

    Quote Originally Posted by alinel View Post

    I also happen to study these things in details when i build my impulse with the following mods, and learnt a bit or 2 about how chassis mechanics work.

    1. Engine swap
    2. Fork upgrade to 43mm Showa Cartridge from 1989 Honda CR125R
    3. 21'' DID Al rim w/ Ceat 90x90 21 Himalayan tyre
    4. Speedo wont work with the 21 inch wheel, so used a wheel sensor magnet with a generic computer for Speedo, ODO
    5. Pro Taper CR high SE bars, MSR handguards
    6. Tank painted white and shrouds removed
    7. Taper roller 32005 Bearings replacing the cup and cone ball bearings
    8. Swingarm swapped from a 1986 Honda XR250R - increases wheel base by 40mm and reduced flex
    9. Zedling Suspension (Pune) custome made rear shock for the XR250R swingarm
    10. BBR big bore kit and CAMs, BS33 CV carb 118 Main jet, 20 Idle jet
    11. Same old mega phone exhaust, the DB killer fell off in the event !
    12. 1988 XR200 rear wheel and hubs along with Drum Brake backing plate with cam.
    Can i please know more about the fork upgrade ? and from where did you sourced BBR bigbore kit and cams ?
    [SIGPIC][/SIGPIC]

  8. #2958
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    Default Re: Hero Impulse ownership experience

    Quote Originally Posted by devils doom View Post
    CV Carb's are good for mileage and perform decent with with less headache but have you tried D slide 28mm PWK carb or Flat slide VM 28mm carb.
    Also the CVs are rather linear across the rpms. Flatslides like PWK or TM are a little more track based, performance oriented. Used to be fun on Yamaha 135 5speed but being more of a tourer, on Impulse, I stick to the CVs for obvious reasons.

  9. #2959
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    Default Re: Hero Impulse ownership experience

    Quote Originally Posted by devils doom View Post
    CV Carb's are good for mileage and perform decent with with less headache but have you tried D slide 28mm PWK carb or Flat slide VM 28mm carb.

    ----consecutive posts auto-merged-----



    Q: Can i please know more about the fork upgrade ? and from where did you sourced BBR bigbore kit and cams ?
    A: This is the BBR kit - https://bbrmotorsports.com/Products/...d=411-HCF-2301 , You can buy it from BBR directly or chose to order from Ebay.com which might be cheaper.Please note that You will need a professional to hone the cylinder in a proper lethe/machineshop/turning works ..

    Forks: Forks like mentioned are from a 1989 Honda CR125 Mx bike (open cartridge showa 43mm fully adjustable for rebound and compression dampening) with about 10.5 inches of travel (265 mm). This specific model uses the same steering stem bearings to work on the impulse without any mods. 26 x 47 x 15 - 32005/26 if i recall the bearing size. (https://www.allballsracing.com/forkconversion - refer here for any such info)

    Work involved :

    Name:  WP_20180125_08_31_14_Pro.jpg
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Size:  91.7 KB

    As you can see. There is a fair bit of work involved. Now, the fork swap is something pretty straight forward if you have the entire kit like I did (Wheels, brakes, T clamps, Spacers, etc) however, what is critical with the impulse is to make sure that the geometry is set correct with the same or close to same as the OE specs. Castor, trail, wheel base etc. Also, another key metric is to ensure that the front and rear suspension have identical travel (6.8 inches F, 5.9 inches R for Impulse) to ensure that they compress and rebound at "Comparable rates". This meant that I had to have atleast 4 more inches of travel at the rear without increasing the seat height by the same which will end up making the bike really tall. So this is where the 1986 xr250r comes in. It has a different motion ratio (15mm closer than the OE swingarm at the pivot fulcrum, more about motion ratio https://www.quora.com/How-do-I-calcu...arm-suspension) by enhancing the stroke of the rear shock, as well as losing some unspring weight and gaining rigidity as its a aluminium unit. More unsprung weight has been lost using 1986 xr250r wheels (DID aliminium 1.65 & 1.85 vs Mild steel 1.85 & 2.15 for the original) and Hubs, which are made from magnesium ! The original rear shock in an impulse has a stroke of 48 mm. The shock we made has 62mm and with the change in ratio, it has a 9 inches travel at the back.

    Hope this helps !
    devils doom and trnaren like this.

  10. #2960
    Addicted curse's Avatar
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    Default Re: Hero Impulse ownership experience

    Forks: Forks like mentioned are from a 1989 Honda CR125 Mx bike (open cartridge showa 43mm fully adjustable for rebound and compression dampening) with about 10.5 inches of travel (265 mm). This specific model uses the same steering stem bearings to work on the impulse without any mods. 26 x 47 x 15 - 32005/26 if i recall the bearing size. (https://www.allballsracing.com/forkconversion - refer here for any such info)

    @alinel

    I need your help.

    I am in planning to swap Karizma Suspension with impulse.(Both front and rear)
    Front and Rear rims will be 18 inch.

    I am not clear with the geometry.


    Both Karizma and Impulse have 26 degree caster.(Stock)
    Trail on Karizma is 94 mm and Impulse is 99 mm.

    Once I swap the front forks all these numbers will go for toss.

    The caster and trail will change to say x and y respectively.
    The above will effect the ride dynamics.

    I will not have provision to change wheel base,also I do not want to alter fork length by any means.

    The only thing I will have control is over rear shock mounting angle/length and this will allow me to
    set one of the parameter caster or trail to stock Karizma.

    So my questions
    Is my method of looking at the whole thing correct?
    If not what geometry parameters i need to check/follow to do the swap?

    If yes,what should I match Caster or Trail length?

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